Feature

Front Matter

Radioactive Potassium Is New ‘Clock’ to Check Age of Earth

Shortwave Radio Aids in Recording Sea-Birds’ Chorus

Babylonians Merit Honor as Original “Fathers of Science”

No Sex Crime Trivial, Says Physician, Urging Mental Care

Veterans’ Administration Operates 5 Cancer Hospitals

Over-Anxious Parents May Be Cause of Children’s Stuttering

In Science Fields

Twins May Become Unlike

Scientists to Explore “Lost World” in Grand Canyon

Oil Hunting Is Still Risky despite Better 1936 Record

Robot Detects and Radios Cloud’s Altitude to Pilot