Technological Advances
| RESOURCE | GRADE LEVEL | MEDIA TYPE |
|---|---|---|
Air Bag DesignUsing automobile crash test footage, this video segment adapted from NOVA shows some of the challenges in designing the air bag. |
3-12 |
Video |
Airplanes: Designing for StealthExplore this NOVA interactive activity to see how engineers have modified a military plane's sound, shape, and heat emissions to minimize detection. |
6-12 |
Interactive |
Antarctica: A Challenging Work DayWhat happens when the ground under your feet is ice and it's moving? This video segment adapted from NOVA features some of the dangers faced by scientists conducting research in Antarctica. |
3-12 |
Video |
Antarctica: Sea IceThis video segment adapted from NOVA uses microwave images to reveal how sea ice doubles the size of Antarctica each winter. Rare footage shows how sea ice crushed the famous ship Endurance in 1914. |
K-12 |
Video |
Antarctic Ice Movement: Part IIWithin Antarctic ice sheets are fast-moving streams of ice. This video segment adapted from NOVA hypothesizes about how ice streams are the result of warming at the end of the last ice age. |
6-12 |
Video |
Are Computers Intelligent?This video excerpt from NOVA: “Smartest Machine on Earth” explains why computers can be so good at chess. |
6-12 |
Video |
Are We Alone?This video segment adapted from NOVA features a variety of scientific perspectives on the age old question, "Are we alone in the universe?" Animations make vivid the improbability that we could intercept a radio wave signaling extra terrestrial intelligence. |
6-12 |
Video |
Astronauts in Hard HatsThis media-rich series of interviews from the NOVA Web site explores the unique challenges faced by astronauts doing construction work in outer space. |
6-12 |
Document |
The Beginnings of the TelescopeThis animated essay from the NOVA Web site examines the design of Galileo's refracting telescope and Sir Isaac Newton's reflecting telescope. |
6-12 |
Document |
Bioengineering Body PartsIn this video segment adapted from NOVA scienceNOW, scientists discuss their attempts to grow human body parts in a jar. |
9-12 |
Video |
Birth of a Supernova, Type IaIn this interactive activity from NOVA Online, learn about a type of exploding star — a Type Ia supernova — that is so bright that astronomers can measure the distance to the galaxy in which it resides, and even learn which elements make up the star. |
6-12 |
Interactive |
Brain TraumaFind out how serious head concussions can be in this video segment adapted from NOVA scienceNOW.
|
6-12 |
Video |
Breaking Point: Testing Tensile StrengthThis video excerpt from NOVA’s "Making Stuff: Stronger" and accompanying demonstration illustrate the toughness and tensile strength of Kevlar® and other everyday materials. |
6-12 |
Video |
Bt CornThis video segment from FRONTLINE/NOVA: "Harvest of Fear" looks at corn that has been genetically modified to resist one insect pest, and the multiple concerns it raises. |
9-12 |
Video |
Build a BridgeSurvey potential bridge sites, research bridge design, and select the right bridge for the right location in this interactive activity from the NOVA Web site. |
6-12 |
Interactive |
Building a Cleaner BatteryThis video excerpt from NOVA’s "Making Stuff: Cleaner" and accompanying activity guide for grades K–8 introduce students to the design and use of batteries and the rapidly developing science of clean energy and clean materials. |
6-12 |
Video |
The Business of BioplasticsThis video excerpt from NOVA’s "Making Stuff: Cleaner" and accompanying demonstration introduce students to the production and importance of bioplastics, or plastics made from plant or animal products. |
6-12 |
Video |
Can a Computer Fly an Airplane?This video excerpt from NOVA shows how the computer system on the A330 airplane can fly the plane safely without a human pilot. |
6-12 |
Video |
Capturing CarbonIn this video segment adapted from NOVA scienceNOW, a scientist, inspired by his daughter's science fair project, develops a synthetic "tree" to remove excess carbon dioxide from the air. |
6-12 |
Video |
Capturing Carbon: Where Do We Put It?In this interactive activity from NOVA scienceNOW, explore options for storing carbon dioxide in order to prevent further global warming. |
6-12 |
Interactive |
Carbon-Fiber Car of the FutureIn this video segment adapted from NOVA, find out how cars made of a material stronger than steel and half the weight can help combat climate change. |
6-12 |
Video |
Centripetal Force: Pulling Cs and GsIn this interactive activity from NOVA, discover how centripetal force can affect you when riding in a car or flying at high speeds in a fighter jet. |
3-8 |
Interactive |
Chasing TornadoesIn this video segment adapted from NOVA, scientists are on the hunt for tornadoes. Using Doppler radar, they gather data in the hopes of solving the mystery of how tornadoes form. |
6-12 |
Video |
Classical vs. Transgenic BreedingThis video segment from FRONTLINE/NOVA: "Harvest of Fear" explains that genetic engineering and classical breeding both alter the genetic makeup of crop plants. |
9-12 |
Video |
Dating Lava Flows on Mauna Loa Volcano, HawaiʻiIn this video segment adapted from NOVA, scientists search
for carbonized remains of plants preserved in lava flows to find out how
long it has taken rain forests on Hawaiʻi to regenerate after
a volcanic eruption. |
3-12 |
Video |
Deadly Letters: The Anthrax MysteryIn this media rich lesson plan from NOVA scienceNOW, student teams investigate a fictional anthrax case by modeling DNA sequencing and tracking down the guilty lab. |
9-12 |
Lesson Plan |
Deep-Sea Vents and Life's OriginsDeep-sea vents are home to life forms that do not rely on the Sun's energy. They depend instead on energy from volcanoes on the ocean floor. This video segment adapted from NOVA hypothesizes that life on Earth may have begun in this extreme environment. |
3-12 |
Video |
Earthquakes: San FranciscoThe history of earthquakes in the San Francisco Bay area is plotted on a digital map and analyzed in this video segment adapted from NOVA. |
6-12 |
Video |
Earthquakes: The SeismographThis video segment adapted from NOVA uses historical illustrations, photographs, and animations to explain how seismographs work, the difference between P and S waves, and the Richter scale. |
6-12 |
Video |
Eclipse of the CenturyThis video segment adapted from NOVA features spectacular footage from the 1991 solar eclipse that fortuitously occurred directly over several major astronomical observatories in Hawaiʻi. |
3-12 |
Video |
Engineer a Crop: Transgenic ManipulationYou're the geneticist now. In this interactive feature from the NOVA/FRONTLINE "Harvest of Fear" Web site, use the latest in genetic technology to engineer your own "supercrop" of tomatoes. |
9-12 |
Interactive |
Evidence for the Big Bang TheoryThis video segment adapted from NOVA tells the story of two scientists who inadvertently discovered microwave radiation that is now believed to be heat left over from the Big Bang. |
9-12 |
Video |
Exploring the Arctic SeafloorIn this interactive activity adapted from NOVA scienceNOW, learn what some of the first imagery ever shot on the Arctic Ocean seabed tells us about life in extreme environments. |
6-12 |
Interactive |
Extreme Temperatures on the MoonIn this video segment adapted from Interactive NOVA, astronaut John Young experiences extreme temperatures on the Moon that are a result of the Moon's low gravity and lack of atmosphere. |
3-12 |
Video |
A Family DiseaseThis video segment from NOVA: "Cracking the Code of Life" explores the implications of genetic testing for breast cancer. |
9-12 |
Video |
Fastest Glacier In this video segment adapted from NOVA scienceNOW, scientists in western Greenland explain how a glacier there is shrinking and moving faster due to increased melting.
|
6-12 |
Video |
Finding Cures Is HardThis video segment from NOVA: "Cracking the Code of Life" explains the difficulty of curing genetic diseases such as cystic fibrosis. |
9-12 |
Video |
Finding Disease GenesThis video segment from NOVA: "Cracking the Code of Life" explains the process of finding genes that cause disease. |
9-12 |
Video |
Fire Safety in High RisesThis video segment adapted from NOVA explains how the sprinkler
revolutionized fire safety and also features developments in fire-safety design for high-rise
buildings. |
6-12 |
Video |
Flood: Farming and ErosionIn this video segment adapted from NOVA, scientists investigate how farming along the Mississippi River impacts floods and what can be done about it. |
3-12 |
Video |
Forensic DNA AnalysisThis video segment from NOVA: "The Killer's Trail" investigates the potential for DNA evidence to solve murder cases, even those from the distant past. |
9-12 |
Video |
ForensicsFind out how DNA profilers analyze bits of tissue to identify human remains. From NOVA: "Lost on Everest" Web site. |
9-12 |
Document |
Fuel CellsIn this video segment adapted from NOVA scienceNOW, hydrogen fuel cell cars promise pollution-free driving, but will we see them anytime soon? |
6-12 |
Video |
Galileo: Discovering Jupiter's MoonsThis video segment adapted from NOVA shows how Galileo, using his newly developed refracting telescope, observed four of Jupiter's moons, the first astronomical bodies to be discovered since ancient times. |
3-12 |
Video |
Galileo's TelescopeThe invention of the telescope helped change our understanding of the universe. This video segment adapted from NOVA looks at Galileo's contribution to this technology. |
6-12 |
Video |
Galileo: SunspotsThis video segment adapted from NOVA shows how Galileo used his telescope to carefully observe and study sunspots. |
3-12 |
Video |
Genetic ModificationThis video segment from NOVA: "Cracking the Code of Life" looks at the potential created by understanding the human genome. |
9-12 |
Video |
Genetics Case StudiesWrestle with ethical issues concerning genetic rights and practices from the NOVA: "Cracking the Code of Life" Web site. |
9-12 |
Document |
Genetic VariationThis video segment from NOVA: "Cracking the Code of Life" explores the genetic similarities and differences among organisms. |
9-12 |
Video |
Genome FactsThis list from NOVA: "Cracking the Code of Life" Web site provides some of the basic, yet impressive, facts and figures about the Human Genome Project. |
9-12 |
Document |
Getting Airborne and Wing DesignWhat makes an airplane fly? Discover the connection between Newton's third law of motion and flight in this interactive activity from the NOVA Web site. |
6-12 |
Interactive |
Global Warming: Beyond Fossil FuelsMartin Hoffert, professor of physics at New York University, discusses global warming and alternative energies in this interview from the NOVA/FRONTLINE Web site. |
6-12 |
Document |
Global Warming: Carbon Dioxide and the Greenhouse EffectThis video segment adapted from NOVA/FRONTLINE demonstrates the physical property of carbon dioxide that causes the greenhouse effect. |
6-12 |
Video |
Global Warming: Graphs Tell the StoryExamine these graphs from the NOVA/ FRONTLINE Web site to see dramatic increases in the temperature of Earth's surface and greenhouse gases in the atmosphere. |
6-12 |
Document |
Global Warming: Graphs Tell the StoryExamine graphs from the NOVA/FRONTLINE Web site to see dramatic changes in the temperature of Earth's surface and in the levels of greenhouse gases in the atmosphere. |
9-12 |
Document |
Global Warming: The Developing WorldThis video segment adapted from NOVA/FRONTLINE looks at the future of global warming as developing nations, including India and China, increase their need for energy. |
6-12 |
Video |
Global Warming: The Hydrogen CarIs the hydrogen car the answer to global warming? This video segment adapted from NOVA/FRONTLINE looks at the pros and cons of this developing technology. |
3-12 |
Video |
Guess What's Coming to Dinner?Browse through a table full of genetically modified (GM) foods to see what's available now and what's to come. From the FRONTLINE/NOVA: "Harvest of Fear" Web site. |
9-12 |
Interactive |
How Big Is the Universe?In this media-rich essay from the NOVA Web site, astronomer Brent Tully of the University of Hawaiʻi walks you through the latest scientific theories about the size of the universe. |
6-12 |
Document |
How Cancer Cells Grow and DivideThis animation from NOVA: "Battle in the War on Cancer: Breast Cancer" describes how oncogenes cause cancer and how cancerous cells can spread throughout the body. |
6-12 |
Video |
How Do Tornadoes Form?In this video segment adapted from NOVA, scientists use computer simulations to explore the question of how supercell thunderstorms produce tornadoes. |
6-12 |
Video |
How Do You Get to the Moon?This video, adapted from NOVA, showcases the competing engineering plans designed for landing a person on the Moon for the first time. |
6-12 |
Video |
Human Genome ProjectThis video segment from NOVA: "Cracking the Code of Life" looks at the meaning and significance of the effort to decode the human genome. |
6-12 |
Video |
Hurricanes: New Tools for PredictingThis video segment adapted from NOVA scienceNOW features new advances in predicting the intensity of hurricanes. |
6-12 |
Video |
Imaging with RadarThis interactive activity from NOVA features synthetic aperture radar (SAR), which uses radio waves to create high-quality images. Examine SAR images of Washington, D.C., and learn about this technology's unique advantages. |
6-12 |
Interactive |
Ingredients for Life: WaterThis video segment adapted from NOVA goes on a whimsical journey in search of life forms thriving in extreme conditions on Earth and in outer space. Animations show ice on Jupiter's moon, Europa, and signs that water once existed on Mars. |
3-12 |
Video |
Inside a Solar CellThis interactive activity adapted from NOVA Online features animations that illustrate the components of a typical photovoltaic cell and how it converts solar energy into electricity. |
9-12 |
Interactive |
Island of Stability In this video segment adapted from NOVA scienceNOW, follow scientists in their quest to understand how stable elements are made and how to create the elusive element 114.
|
9-12 |
Video |
Jupiter: Earth's ShieldJupiter's immense gravity protects Earth from asteroids. In this video segment adapted from NOVA, scientists searching for signs of life in the universe identify solar systems with Jupiter-like planets that may be shielding smaller nearby Earth-like planets from comets and asteroids. |
6-12 |
Video |
The Leaning Tower: Where It Stands TodayWill the Leaning Tower of Pisa give way to gravity? In this interview from the NOVA Web site, engineer John Burland relates the difficult job of saving the tower. |
6-12 |
Document |
Lightning HuntersFind out how scientists and engineers use rockets to attract lightning in this video segment adapted from NOVA. |
3-12 |
Video |
The Light StuffThis interactive activity from the NOVA Web site asks which items in your home can slow down the speed of light. |
6-12 |
Interactive |
Luis von Ahn: Computer ScientistThis video segment adapted from NOVA scienceNOW profiles Luis von Ahn, the computer scientist and award-winning college professor behind innovations to prevent e-mail spam and digitize rare books. |
6-12 |
Video |
Magnetic MicrobotsThis video excerpt from NOVA’s "Making Stuff: Smaller" and accompanying activity for grades K–8 teach students how materials scientists are building extremely small robots that may be able to travel inside the human body. |
6-12 |
Video |
Making Cortisone From Plants This video segment adapted from NOVA is a dramatized story of chemist Percy Julian’s work to synthesize cortisone. Find out how a biological process, not a chemical one, proved the key to producing cortisone in bulk.
|
6-12 |
Video |
Mars Dead or Alive: A Hostile EnvironmentThis NOVA video segment describes the challenges presented by the frozen desert environment of Mars to NASA engineers designing two robots that will journey millions of miles to the red planet. |
6-12 |
Video |
Mirror Neurons This video segment, adapted from NOVA scienceNow, introduces the latest research on a system of neurons that plays a part in how people relate to each other.
|
6-12 |
Video |
Mount Pinatubo: Predicting a Volcanic EruptionThis video segment adapted from NOVA relates the dramatic story of vulcanologists trying to predict the timing of the cataclysmic eruption of Mount Pinatubo in the Philippines. |
6-12 |
Video |
A Nanotube Space ElevatorIn this video adapted from NOVA scienceNOW, find out about the discovery of a new building material, the carbon nanotube, whose physical properties could theoretically enable the creation of a 22,000-mile elevator to space. |
6-12 |
Video |
Nanowires and the Ever-Shrinking MicrochipThis video excerpt from NOVA’s "Making Stuff: Smaller" and accompanying demonstration introduce students to small, thin wires, called nanowires, that may help make computers and electronics even smaller in the future. |
6-12 |
Video |
Nature's PharmacyIn this interactive activity from NOVA, learn about chemicals in nature that are used in medicine. |
3-12 |
Interactive |
Newton's Third Law of Motion: Astronauts in Outer SpaceIn this video segment adapted from NOVA, NASA learns hard lessons from the first American attempt to do work while "walking" in space. The video also explores Newton's third law of motion. |
3-12 |
Video |
New Ways to Catch RaysThis interactive resource adapted from NOVA Online explores eight of the latest technological developments designed to harness the energy of the Sun. |
9-12 |
Interactive |
Oil Spill: Exxon Valdez, 1989This video segment adapted from NOVA follows the clean-up effort after the 1989 Exxon Valdez oil spill off the coast of Alaska. Also featured is a marsh where an oil spill occurred 20 years earlier; analysis suggests that environmental damage may last for decades. |
6-12 |
Video |
On Human CloningThree cloning experts share their opinions in these interviews from the NOVA "18 Ways to Make a Baby." Web site. |
9-12 |
Document |
OPERATION: Heart TransplantPerform a virtual heart transplant in 19 easy steps with this interactive feature from the NOVA: "Electric Heart" Web site. |
6-8 |
Interactive |
Organic Farming: Conserving TopsoilAgainst the backdrop of the devastating 1930's Dust Bowl, this video segment adapted from Interactive NOVA profiles an organic farmer and the techniques he uses to conserve topsoil. |
3-12 |
Video |
The Origin of the ElementsThis video segment adapted from NOVA explains the origin of the elements and how scientists use unique element profiles to identify supernova types. |
6-12 |
Video |
Outsmarting OobleckThis video excerpt from NOVA’s "Making Stuff: Smarter" and accompanying activity for grades K–8 help students investigate some “smart” materials that respond to forces or changes in their environment in unusual ways. |
6-12 |
Video |
Pilotless Flight: Timeline of Unmanned Aerial VehiclesExplore this NOVA interactive timeline and discover the many technological innovations in the history of unmanned flight, from hot-air balloons to miniature flying robots. |
6-12 |
Interactive |
Preimplantation Genetic DiagnosisThis video segment from NOVA: "18 Ways to Make a Baby" describes a technique used to determine the health of a developing embryo. |
9-12 |
Video |
Pyrotechnically SpeakingMeet chemistry professor Dr. John Conkling in this interview from the NOVA Web site and learn why fireworks are his passion. |
6-12 |
Document |
Quarks: Inside the AtomThis video segment adapted from NOVA shows how the particle accelerator helped physicists find parts of the atom even smaller than protons and neutrons. |
6-12 |
Video |
RNAi Therapy In this video segment adapted from NOVA scienceNOW, learn about RNAi's potential to treat a wide range of genetic and infectious diseases.
|
9-12 |
Video |
RoboflyFeaturing slow-motion footage of insects in flight, this video adapted from NOVA explores the engineering challenge of designing a robotic aerial vehicle that flies like a bug. |
6-12 |
Video |
Robot RaceIn this video segment adapted from NOVA, cars drive themselves. Teams of designers using different technologies compete for a two-million-dollar prize to see which unmanned vehicle will make it to the finish line first. |
3-12 |
Video |
The Role of Genetics in ObesityIn this video segment from NOVA scienceNOW, meet researchers who are studying obesity and trying to understand the role that hormones and genetics can play in regulating appetite. |
6-12 |
Video |
Sequence for YourselfHow do researchers read the tiny As, Gs, Ts, and Cs that comprise DNA? This step-by-step explanation shows you. From NOVA: "Cracking the Code of Life." |
9-12 |
Interactive |
The Sequencing Race BeginsThis video segment from NOVA: "Cracking the Code of Life" looks at one of the key players in the race to decode the human genome. |
9-12 |
Video |
Should We Grow GM Crops?Learn the pros and cons of genetically modified (GM) crops, and cast your vote on whether they should be grown. From the FRONTLINE/NOVA: "Harvest of Fear" Web site. |
9-12 |
Interactive |
Smart BridgesIn this video segment adapted from NOVA scienceNOW, learn about engineering innovations that could help detect a bridge's structural weaknesses before they become dangerous. |
6-12 |
Video |
Smart Power GridThis video segment adapted from NOVA scienceNOW provides an overview of the existing United States power grid, and envisions a "smart" power grid that would prevent problems, such as blackouts, and reduce energy waste and pollution. |
6-12 |
Video |
Snapshot of U.S. Energy UseThis video segment adapted from NOVA/FRONTLINE looks at American
energy consumption and the resulting production of greenhouse gases. |
3-12 |
Video |
Solar MagnetismThis video segment adapted from NOVA describes how the Sun's magnetism can have an effect here on Earth, from dramatic auroras to a mini-Ice Age in the 1600s. |
6-12 |
Video |
Solar Paint Your RoofIn this video segment adapted from NOVA, see how nanotechnology might be used to create a new, cheaper way to produce solar electricity for the home. |
6-12 |
Video |
Solar Panels for Your HomeIn this video segment adapted from NOVA, take a look inside a solar panel to see how it works, and hear firsthand about the benefits from homeowners who are using this technology.
|
6-12 |
Video |
Sound Waves Underwater: Experiment with SonarThis animation from the NOVA Web site describes how sonar uses sound waves to "see" underwater. |
6-12 |
Document |
Sound Waves Underwater: The Loch Ness MonsterThis video segment, adapted from NOVA follows a team of enthusiasts and scientists who attempt to find a trace of the Loch Ness monster by scouring the lake with sonar. |
6-12 |
Video |
Sound Waves Underwater: True or FalseThis interactive quiz from the NOVA Web site features an array of interesting facts about the nature of sound underwater. |
3-12 |
Interactive |
Steam MachineExplore NOVA Online's interactive steam engine and discover how this machine can convert heat to mechanical energy. |
3-12 |
Interactive |
Stem Cell DebateThis essay from the NOVA "Life's Greatest Miracle" Web site explores the debate over the use of embryonic stem cells in scientific research. |
9-12 |
Document |
Stories in the IceTake a journey back through time, on the NOVA/FRONTLINE Web site, using ice cores to learn about Earth's climatic history, including evidence of global warming and nuclear activity. |
6-12 |
Document |
A Strange New PlanetThis video segment adapted from NOVA features the first planet to be discovered outside our solar system. Its surprisingly large size and short orbit sent scientists back to their data and led them to discover similar planets. |
6-12 |
Video |
String Theory: A New Picture of GravityThis video segment from NOVA describes the general theory of relativity and the theory of electromagnetism. |
6-12 |
Video |
String Theory: A Theory of Everything EssayIn this essay from the NOVA Web site, string theorist Brian Greene introduces the basic ideas behind string theory and how it might help us better understand the universe. |
9-12 |
Document |
String Theory: Strings to the RescueThis video segment from NOVA discusses the challenge of unifying the force of gravity and the forces described by quantum mechanics into a single theory of unification. |
9-12 |
Video |
Super SalmonThis video segment from FRONTLINE/NOVA: "Harvest of Fear" explores genetic modification of salmon and possible consequences. |
9-12 |
Video |
Synthesizing an Alkaloid In this video segment, adapted from NOVA, learn how chemist Percy Julian revolutionized chemistry by synthesizing the alkaloid physostigmine
from scratch—the first total synthesis of a chemical compound.
|
9-12 |
Video |
Taking the Earth's TemperatureThis video segment from FRONTLINE/NOVA: "What's Up with the Weather?" depicts research efforts to record Earth's past and present temperatures shifts. |
9-12 |
Video |
Strong as Steel: Testing ToughnessThis video excerpt from NOVA’s "Making Stuff: Stronger" and accompanying activity for grades K–8 help students investigate the strength and toughness of steel and other everyday materials. |
6-12 |
Video |
To Survive at High VelocityThis video segment adapted from NOVA looks at speed, velocity, and centripetal force on the racetrack. |
6-12 |
Video |
Tour the Electromagnetic SpectrumTake NOVA's interactive tour of the electromagnetic spectrum and find out why your eyes are like antennae for a narrow band of electromagnetic radiation. |
6-12 |
Interactive |
Trying to Breathe on Mount EverestIn this video segment adapted from NOVA, climbers attempting to reach Mount Everest's summit must contend with the low levels of oxygen at high altitudes. |
6-12 |
Video |
Viewpoints: Harvest of FearWhat do the experts say about genetically modified (GM) foods? Read these interview excerpts from the FRONTLINE/NOVA: "Harvest of Fear" Web site to find out. |
9-12 |
Document |
When Did the First Americans Arrive?In this video segment adapted from NOVA, recent archeological evidence leads scientists to revise existing theories about human migrations into the Americas around the time of the last ice age. |
6-12 |
Video |
Who Owns the Genome?This video segment from NOVA: "Cracking the Code of Life" examines the social and ethical implications of genome research. |
9-12 |
Video |
Your Carbon DietIn this interactive activity from the NOVA/FRONTLINE Web site, you can click on various items in a typical New England house to find out how much energy each uses and some ways to reduce energy consumption in your home. |
6-12 |
Interactive |
Your Carbon DietFind out how much energy you use and some ways to conserve in this interactive activity from the NOVA/FRONTLINE Web site. |
3-12 |
Interactive |
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