Caffeine Shapes Brain to Make Us Buzz

It's in coffee, tea, soda and energy drinks. There's even a bit of it in chocolate. In fact, caffeine is one of the most widely-consumed substances in the world, and there are many people who say they can't start their day without it. "It makes us feel better, particularly if we haven't slept well or we've been working late at night," noted neurologist Nora Volkow, director of the National Institute on Drug Abuse, adding "we really don't completely...

© La Voix de l'Amérique - vendredi 14 août 2015