The first land plants appeared over 400 million years ago.

There are more trees than stars in our galaxy.

A bolt of lightning is about one inch wide but can be miles long.

Some plants grow toward light sources.

The Carboniferous period had vast swamp forests.

Some trees can communicate with each other using underground fungal networks.

Water is the only common substance on Earth that naturally exists in all three states — solid, liquid, and gas — at everyday temperatures.

Fossilized trees provide clues about ancient climates.

Caribou migrate in large herds across Arctic regions.