Notebook

Physics

Light Projects

This colorful, interactive Web site provides a lively introduction to the nature of light and spectra. A product of Project LITE (Light Inquiry Through Experiments) at Boston University, the site offers a variety of applets, activities, and materials on topics ranging from color mixing and afterimage effects to moire patterns and geometrical optics. A fascinating […]

Humans

From the June 2, 1934, issue

The first chimpanzee twins born in captivity, increased speed and safety for aircraft, and a new pH indicator.

Astronomy

Transit of Venus

On June 8, Venus will pass across the face of the sun (as viewed from Earth).