![](http://static.ddmcdn.com/gif/chili-peppers-250x250.jpg)
Exposure to cold and consumption of chemicals found in chili
peppers both appear to increase the number and activity of so-called
brown fat cells.
![](http://r.ddmcdn.com/w_160/w_640/h_360/gif/videos/arguing.jpg)
You'd think the most important thing you need to win an
argument are good, solid, supporting facts. But in the middle of a
heated debate, sometimes facts can work against you. Trace explains why
that is, and what you REALLY need to win a fight.
![](http://static.ddmcdn.com/gif/recipes/exercise-may-work-out-well-for-your-nose-131017-200x200.jpg)
Regular exercise may lower the risk that a person's sense of smell will fade, which tends to happen as people age.
![](http://static.ddmcdn.com/gif/blogs/dnews-files-2013-10-does-sleep-literally-clear-the-mind-131017-250x250.jpg)
Brain cells get smaller during sleep, and the brain clears away toxins, reports a new study.
![](http://static.ddmcdn.com/gif/upright-man-250x250.jpg)
The earliest known population of humans outside of Africa has
been found, with huge implications that could erase species from the
human family tree.
![](http://static.ddmcdn.com/gif/recipes/is-being-a-good-samaritan-a-matter-of-genes-131017-200x200.jpg)
What motivates people to help others? Could altruistic behavior be influenced by genes?
![](http://r.ddmcdn.com/w_160/w_640/h_360/gif/videos/brain-cleaning.jpg)
Scientists have just discovered a new, very important reason
for you to get a good night's sleep. For the first time, they've been
able to see the brain physically cleaning itself while its owner is
asleep! Anthony explains how this cleaning works.
![](http://static.ddmcdn.com/gif/recipes/could-a-vaccine-for-ptsd-protect-soldiers-131016-200x200.jpg)
Controlling levels of a hormone produced during stress could prevent formation of PTSD.
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