Feature

In Science Fields

Fossils of Shark Found in Pennsylvania Rocks

X-Raying Male Cells Causes Increase in Male Offspring

Muscle Tone Drives Blood in Veins Back to Heart

Photograph Shows Atom as If Seen by X-Ray Eye

Front Matter

Corona May Be Seen without Eclipses by Means of Television

Archancestral Crocodile Modeled for Museum

Earthquakes of the Week

Biologists Urged to Drop Senescent Evolution Theories

Acetyl-Choline May Prevent Benzene Deaths

Headache Remedy Believed Cause of New Fatal Disease