If you have an infant head-shaping pillow, get rid of it immediately. Do not donate or give it to anyone else. Be aware that these pillows are not safe or effective for preventing or treating flat head syndrome or any other medical conditions.

Fact

A weird fact about the human body is that a single square inch of skin has about 300 sweat glands.

Myth

Lightning causes thunder.

A scientific and philosophical nitpick here, but lightning is just a stream of electrons zapping from cloud to cloud or ground to cloud. This in turn heats air into a tube of plasma that’s three times hotter than the surface of our sun.

That tube violently expands and contracts nearby air, creating an unmistakable crack and rumble — not the flow of electrons itself.