Feature

Einstein Backs Lemaitre Idea That Cosmic Rays Are Birth Cries

In Science Fields

Nature Ramblings: Clothes Moth

Front Matter

Hybrid Macaw Developed “Throwback” Feathers

Aerial Photography Taught at Harvard University

The Mechanical Equivalent of Heat: “A Classic of Science”

First Step Taken toward Synthetic Sex Hormone

Boron Atom Smashed by British Physicists

Scientists Measure Size of Genes without Seeing Them

Epicenter of Alaskan Quake Located in Mountains

Largest Ship to Recoup Loss of France’s Atlantique