Hand tremors are usually caused by stress, caffeine, or medications - not serious diseases. Learn the real causes here.

“Ever wonder why [the] cabin crew sits [on their hands] during takeoff and landing ... folks pitied the frequent flyers for the “scary” stress of having to constantly prepare for a ...

But what happens when these feelings get out of hand in humans today? And why do some of us crave that feeling from scary movies or haunted houses? For answers, we talk to Arash Javanbakht ...