Topology classifies objects by connectivity — a sphere and cube are topologically equivalent.

The Maya city of Tikal was once a powerful urban center.

Fact #1639 · General

There are unknown phenomena.

Fact #2316 · General

The spotlight effect causes people to overestimate how much others notice them.

Fact #1486 · General

In 1978, thousands of people gathered to watch a man attempt to fly using homemade wings.

Fact #779 · General

Corvids are known for advanced problem-solving abilities.

Fact #1316 · General

The development of laparoscopic surgery reduced recovery time.

Fact #1222 · General

Humans tend to remember unfinished tasks better than completed ones.

Fact #961 · General

The introduction of birth control pills transformed reproductive health.

Fact #1223 · General