Feature

Carbon Dioxide May Help High Altitude Flyers

Body Tissues Not Germ-Free; Bacteria in Dissociated State

Gaseous Nebulae May Be Ghosts of Exploded Stars

In Science Fields

When Sharks Ruled the World

Designers Borrow Patterns from Ancient America

Raise Pot Lid, Find Dinner Left on Stove 6,000 Years

Says School Funds Wasted without Health Care

Sun’s Probable Age Ten Million Million Years

Have Found over 1,000 Weapons of First Hunters

Front Matter

World’s Oldest Cemetery Found in Palestine Caves