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. ...

Plasma Fuel Converters convert carbon fuel to rich hydrogen gas by electrifying fuel in an engine. This increases the efficient burning of the fuel, and reduces the resulting pollutants. This document summarizes the...

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...

What is our responsibility to the well-being of others around the planet? This is one of the many pressing questions asked by this uniformly fine digital exhibit and interactive collection created by staff members at the...