This radio broadcast discusses the findings of a conservationist who flew over of most of the continent of Africa in a small plane at low altitude, photographing the ground below every 20 seconds, to form a grid map. The...

This activity introduces the creation of afterimages formed from a prolonged stimulation of the eye’s retina. A flashlight, paper, and tape are used to produce afterimages viewed on one’s hands and a more distant wall. ...

The importance of afterschool programs have been linked to improved reading and math grades and a steady decline in drug, cigarette, and alcohol use by those who participate in such programs. The Afterschool Alliance was...

Ag in the Classroom is a resource for teachers who teach about agriculture. Information is provided about grants for teaching agriculture, links for resources, conferences, and a teacher page. The teachers page contains...

Against the Odds is an online exhibit that is based on an in situ exhibit at the National Library of Medicine. The purpose of the exhibit is to demonstrate the "revolution in global health" that is taking place and to...