society and culture

April 2009

An Internet guide to allergies and the immune system

As human populations expand and lions’ prey dwindles, the poorest people—and hungriest lions—pay the price.

Even at an early evolutionary stage, bird-like dinosaurs occupied different niches in the same ecosystem,

Dung beetles use light from the MIlky Way to find their way

Recently identified subspecies ranges farther than first imagined: across Africa.

An archaeologist ponders the fate of Hoover Dam