The NOVA Education: "Hunting the Elements" Collection on PBS LearningMedia is contributed by the WGBH Educational Foundation. It is a collaborative production of WGBH Education, the WGBH Media Library, WGBH Interactive, and NOVA Education.

Major funding for this collection is provided by the U.S. Department of Energy. This material is based upon work supported by the U.S. Department of Energy under Award Number DE-SC0007358. Disclaimer: This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendations, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof.