Weightlifting uses chalk (magnesium carbonate) to absorb sweat — not for grip alone, but for safety.

The human eye can detect a single photon.

Fact #1706 · Human Body

The Earth's core generates geothermal heat.

Fact #293 · Human Body

Your bones are stronger than steel.

Fact #1716 · Human Body

Your stomach replaces itself every few days.

Fact #1696 · Human Body

The Earth's inner core is primarily iron and nickel.

Fact #150 · Human Body

In 1809, two countries declared war and then forgot to sign a peace treaty for years.

Fact #805 · Human Body

Pacemakers help regulate abnormal heart rhythms.

Fact #1200 · Human Body

A hyena’s jaw is powerful enough to crush bone.

Fact #502 · Human Body