Science

The Earth's 'Sixth Extinction' May Be One Of Our Own Making

There have been five major mass extinctions over the last half-billion years, when the diversity of life on Earth suddenly and dramatically contracted. Scientists are currently monitoring an era of mass extinction predicted to be the most devastating since the asteroid impact that wiped out the dinosaurs. But this time around, says Elizabeth Kolbert, author of The Sixth Extinction, it's humans that are causing it.

Study: Stereotypes Drive Perceptions Of Race

Governments, schools and companies keep track of your race. The statistics are used to track the proportion of blacks and whites who graduate from school. They tell us how many people identify themselves as Native American or Asian. They help us measure health disparities. But there's a problem with all those statistics — and the deeper way we think about race.