Speleothems (stalactites and stalagmites) grow at about 0.1 mm per year in most caves.

Some volcanoes remain dormant for centuries before erupting.

Fact #184 · Nature

Some deep-sea fish have expandable stomachs to consume rare prey.

Fact #1407 · Nature

There is enough gold inside Earth to coat the entire planet’s surface.

Fact #2722 · Nature

There are more trees on Earth than stars in the Milky Way — about 3 trillion trees.

Fact #3484 · Nature

The Eiffel Tower grows slightly taller in summer due to heat expansion.

Fact #14 · Nature

Prehistoric ecosystems were diverse and dynamic.

Fact #754 · Nature

Tardigrades can survive extreme radiation, freezing, and even space.

Fact #1868 · Nature

Some plants release chemicals to deter herbivores.

Fact #239 · Nature