The human fetal heartbeat begins around 22 days after conception — before the mother even knows she's pregnant.

Your heart beats about 3 billion times over an average lifetime.

Fact #2679 · Human Body

The heart can sometimes restart after stopping.

Fact #3075 · Human Body

Your brain can store the equivalent of millions of gigabytes of information.

Fact #1908 · Human Body

Your brain can store the equivalent of millions of gigabytes of information.

Fact #2106 · Human Body

Only about 10% of people have a dominant left eye.

Fact #2876 · Human Body

Your brain can store the equivalent of millions of gigabytes of information.

Fact #1925 · Human Body

Your brain can store the equivalent of millions of gigabytes of information.

Fact #1873 · Human Body

Your brain stores memories.

Fact #2390 · Human Body