Endurance athletes often turn to the same stimulant that gives your morning cup of joe its jolt: caffeine. They're increasingly using caffeinated gels and drinks when they compete. But how much is too much?

After years of not understanding coffee, Jerry Seinfeld says he's finally discovered the delight of meeting someone over a cup. "You have coffee and for some reason it makes you talk a lot," he says.

Once people figured out how to roast the seeds of the Coffea plant in the 1400s, coffee took over the world. In doing so, it fueled creativity, revolutions, new business ventures, literature, music 鈥� and slavery.

Feeding on flowers with caffeinated nectars gives bees a memory boost, new research shows. Turns out, other studies have found humans can get a similar boost in short-term memory with caffeine 鈥� if they're exhausted.

College students and 20-somethings are drinking less soda these days but more coffee. That means they are getting more caffeine and likely less sleep, which may lead to academic and even health problems down the road.