Human Body
Why Does Hair Turn Gray? And Can Stress Really Speed It Up?
Why does hair turn gray, and can stress speed it up? Here’s what science says about melanin, aging,…
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Human Body
What Happens When You Talk in Your Sleep?
People can mumble, laugh, shout, or form complete sentences while still asleep. Here is what the brain is…
Human Body
Why Do You Feel Sleepy After Lunch? The Science of the Afternoon Slump
The afternoon slump is not caused by lunch alone. Discover how your body clock, growing sleep pressure and…
Human Body
Why Are Some People Left-Handed? What Science Actually Knows
About one person in ten is left-handed, but scientists still cannot point to a single reason why. Genetics,…
Human Body
Why Does Your Voice Sound So Different in a Recording?
Your recorded voice can sound higher and thinner because the version you normally hear includes vibrations traveling through…
Human Body
12 Strange Things Your Body Does—and the Science Behind Them
Your body sneezes at sunlight, wrinkles its fingertips, moves your eyes while you stare, and sometimes jolts you…
Human Body
Why Do We Wake Up Just Before Our Alarm Goes Off?
Waking a few minutes before your alarm is usually not coincidence alone. Circadian timing, routine and expectation can…