The Butterfly Farm  

http://www.butterflyfarm.co.cr/ed/index.htm

This site, selected by the SciLinks Program sponsored by the National
Science Teachers Association, is a wonderful resource for learning about
butterflies. It contains a photo gallery and a student resource guide
containing units such as  butterfly physiology, pupa stage and the
difference between moths and butterflies. The site can be used in
English or in Spanish.

Electric Heart (from NOVA Online) http://www.pbs.org/wgbh/nova/eheart/

One of many online resources at NOVA, this program tells the story of the pursuit of a practical artificial heart. Here's what you'll find online:

1) Map of the Human Heart: how the human heart works with
an automatically changing color graphic of a heart in cross-section;

2) Amazing Heart Facts;

3) Artificial Human;

4) Pioneering Surgeon: O. H. Frazier: O. H. Frazier has done more heart transplants than anyone else alive, well over 700. He talks about his work, his thoughts, and his hopes;

5) Operation: Heart Transplant: try your hand as a
heart-transplant surgeon in this simplified online procedure;

6) additional resources.

Air Scripts Climate Scripts

Health Scripts Land Scripts

Waste Scripts Water Scripts

Wildlife Scripts

The pieces are written, voiced, and distributed by an independent radio syndicator, Finger Lakes Productions, Inc., of Ithaca, New York. This project is funded by the Teresa and H. John Heinz III Foundation.