Feature

Carbon Dioxide May Help High Altitude Flyers

Back Matter

First Glances at New Books

No Rise in Serious Mental Disease during Depression

Nature Ramblings: Fish Can Be Drowned

When Sharks Ruled the World

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

Mixtec “Family Album” May Hold Secret of Lost Language

Says School Funds Wasted without Health Care

Front Matter

Not “Going to Prairie-Dogs” Drought Cycles an Old Story

All-Metal Airplanes Not in Danger from Lightning