Topic: Proceedings of the National Academy of Sciences

California Condors face 'epidemic' lead poisoning, finds study

Ammunition left in animal corpses is the primary cause of lead poisoning among California Condors, whose numbers have remained low but stable thanks to conservation efforts.

Could novel technique to curb global warming also trigger earthquakes?

As prehistoric birds emerged, giant insects departed (+video)

Why don't mosquitoes get squashed by raindrops? Scientists find an answer.

How military might benefit from study of hard-to-kill mosquitoes

Southern Great Plains could run out of groundwater in 30 years, study finds

How climate change destroyed one of the world's largest civilizations

Radioactive tuna travels from Japan to US faster than wind

Planetary wrecking balls: how Jupiter might have destroyed Earth

Were pliable heads an adaptation to walking upright?

Horsehair helps locate the origins of domestication

Human ancestors used fire a million years ago, finds study

Satellites identify thousands of small hills as ancient human settlements

Alien plant forms invading Antarctica

Change Agent Rethinking Carbon Dioxide (CO2): from a pollutant to a moneymaker

How the 1 percent lives: Yes, the rich take more candy from kids, study finds

How scientists brought 30,000-year-old flower back to life

300-million-year-old 'Chinese Pompeii' found buried under volcanic ash

Why there are no more woolly mammoths

Snakes in the grass: Is the Burmese Python wiping out Everglades mammals?

Scientists reveal secret of humongous mammals

Huge pythons annihilating Everglades wildlife, report scientists (+video)

Oldest dinosaur nursery includes eggs containing embryos

Newly discovered carnivorous plant devours underground worms

How genetically engineered caterpillars spin silk stronger than steel