How Long Would It Take for Every Living Thing on Earth to Die?At least one mass extinction may have only taken 60,000 years.
How Can a Blood Test Tell if You're Schizophrenic?The new method could launch within 18 months.
Please Stop Talking, John Kerry America’s chief diplomat is saying way too much about the Iran deal.
Behind the Scenes
The Great Writing Vs. Talking Debate Is it harder to be a good writer or a good talker?
Push It to the Limit The women’s 1,500-meters record just fell after 22 years. What’s the fastest humans can possibly run?