欧美口爆视频

Age-related changes in our gut bacteria play a key role in making arteries stiff, degrading blood vessels and boosting risk of heart attack and stroke as we get older, according to a new, first-of-its kind study.

Google鈥檚 Abigail Posner chimes in on the future of artificial intelligence. What are some of the limits? When do the ethics cross the line?

This week we鈥檙e talking about sleep. So what does a good night's sleep look like? What does it feel like?

What counts as cheating? Could a prosthetic be a form of cheating? Does the question of cheating even matter if everyone is cheating in the same way?

Think sleeping in on the weekend can repair the damage from a week of sleepless nights? New research says it might actually make things worse.

Could working out five minutes a day, without lifting a single weight or jogging a single step, reduce your heart attack risk, help you think more clearly and boost your sports performance? Preliminary evidence suggests yes.

We talk to scientists about the chemistry behind monogamy, why it feels good to hold hands and why placebos could be effective in getting over heartbreak.

On the 50th anniversary of Garrett Hardin鈥檚 influential essay about the 鈥渇reedom to breed,鈥� the director of the 欧美口爆视频 Population Center contends he missed the mark.

How much do high-tech shoes, special diets and exercises, drafting behind other runners and other strategies actually improve your finish time? A new study spells it out. The takeaway: The faster you are, the harder it is to get faster.

New international rules would require some elite female athletes to medically lower their testosterone levels in order to be able to compete among women. But a new study contends those rules are based on flawed science.