Feature

Another Bright Planet

Anthropologist Sees Russians Becoming One Physical Type

News of Prehistoric America Reported to Mexico Meeting

Nature Ramblings: Roots by the Ton

Front Matter

Plan for Improving Population Drawn by Famed Geneticists

Only Radiation from Sunspots Causes Ionization of $text{F}_{2}$ Layer

“Spool” Spots Hydrochloric Gas in Huge Transformers

Navy’s Huge Test Basin Is Now Nearing Completion

Skull of Biggest Monster Arrives in America

Amateur Astronomers Can Make Vital Contributions

In Science Fields