Many coins are made of precious metals such as gold and silver which makes their value higher than face value.

The introduction of antiseptic surgery reduced infection rates.

Fact #1202 · Science

The Asch conformity experiment revealed how group pressure influences decisions.

Fact #1466 · Science

Lightning can heat air hotter than the surface of the Sun.

Fact #1727 · Science

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

Fact #217 · Science

The Earth's core generates geothermal heat.

Fact #293 · Science

Vaccines train the immune system to recognize pathogens.

Fact #64 · Science

The Stroop effect demonstrates how conflicting information can slow reaction time.

Fact #1463 · Science

Time moves more slowly in stronger gravitational fields.

Fact #1618 · Science