Adaptive Radiation: Darwin's Finches

Finches on the Galapagos Islands have evolved to exploit almost every possible niche. This diagram shows the range of food sources available on the island and the different beak shapes adapted to exploit each of them.

Air Is Matter

This collection of still images presents different ways to visualize air, from billowing sails to windblown hair to tornadoes.

Allopatric Speciation

These images from the Smithsonian Institution depict Nancy Knowlton's work with snapping shrimp in Panama. Knowlton found that the closing of the isthmus -- dividing the Pacific Ocean from the Caribbean -- resulted in new species of shrimp.

All Planet Sizes

This illustration from the Lunar and Planetary Laboratory shows the approximate sizes of the planets relative to each other. Note that the planets are not shown at appropriate distances from the Sun.

Animal and Plant Cell

Think you can tell a yam from a yak? Examine these still images of typical plant and animal cells from Biology by Kenneth R. Miller and Joseph Levine. What similarities and differences can you find?

Animal Babies

This interactive slide show illustrates the variety of animal babies that exist on earth -- some completely independent and others deeply reliant on parental care.

Animal Coverings

It takes a thick skin to withstand the hardships that life has to offer. This collection of images shows a variety of animals, each with a slightly different type of protective covering.

Animal Mouths

This collection of images of six different creatures, including insects and carnivorous vertebrates, illustrates the wide range of mouth types that exist within the animal kingdom.

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Bird Beak Gallery

This collection of images of 10 different birds illustrates the diversity of bird beaks.

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Bird Food

There are almost as many types of bird beaks as there are types of food that birds like to eat. This collection of images shows a wide range of beaks and the types of foods handled by each.

Carbon Cycle Diagram

This diagram from NASA Earth Science Enterprise illustrates Earth's carbon cycle.

Carbon Cycle Diagram

This diagram from NASA's Earth Science Enterprise illustrates the Earth's carbon cycle .

Carbon Cycle Diagram

This diagram from NASA's Earth Science Enterprise illustrates Earth's carbon cycle.

Colorful Creatures

For animals, bright, flashy coloration can serve as a warning or as an invitation. Either way, colorful skin, feathers, and scales yell, "Notice me!" This collection of images shows examples of some of the world's most colorful creatures.

Deserts

Not all deserts are the same. This still collage produced for Teachers' Domain features views of different deserts around the world.

Design Inspired by Nature

In this stills collage produced for Teachers' Domain, see several examples of everyday inventions that were either inspired by nature or are similar in form and function to plants or animals.

The Design Process Poster

This printable image from DESIGN SQUAD illustrates the five steps of the engineering design process.

Design: The Right Tool for the Job

Which tool is the right tool for the job? This collection of images features a series of cutting tools performing the tasks for which they were designed.

Duckweed

These images of duckweed (Lemna spp.) illustrate the basic anatomy and environment of these fast-growing plants.

Electron Transport Chain

This illustration from Biology by Kenneth R. Miller and Joseph Levine describes the steps of the electron transport chain, the second stage in the process of cellular respiration.