Feature

Bering Strait Studied as Land and Sea

Doctors Are Reading

Dogs’ Brains Isolated

Earth’s Oldest Man Now Two Million Years Old

One in 413 Meteors Has Asteroid Origin

Third ‘Ear’ Can Hear Sounds Too Low for Men

Way Found to Compute Space Probe’s Path

Front Matter

[Photograph]: Early Tool

Nature Note

Early Man’s Teeth Gave ‘Survival’ Edge

African Tribal Discards Now Museum Treasure