A Klein bottle is a 4-dimensional object with no inside or outside — it passes through itself without a hole.

The human brain operates on about 20 watts of power.

Fact #1744 · Science

The Earth's inner core is solid despite extreme heat.

Fact #217 · Science

The CERN Large Hadron Collider was built to explore particle physics.

Fact #1003 · Science

The discovery of Helicobacter pylori changed treatment for ulcers.

Fact #1215 · Science

The use of ultrasound improved prenatal care.

Fact #1213 · Science

Antiretroviral therapy transformed HIV from fatal to manageable.

Fact #1208 · Science

Lightning can travel from the ground up into clouds.

Fact #255 · Science

There are more possible shuffles of a deck of cards than seconds since Earth formed.

Fact #1675 · Science