The oldest living organism is a colony of seagrass in the Mediterranean estimated to be 100,000 years old.

Altruism challenges purely self-interested models of human nature.

A moonbow (lunar rainbow) is a rainbow created by moonlight — seen at night near waterfalls.

Titan arum, the corpse flower, has the largest unbranched inflorescence (flower cluster) of any plant.

Tahini, made from sesame seeds, contains more calcium per tablespoon than a glass of milk.

The Angel Falls in Venezuela is the world's highest uninterrupted waterfall at 3,212 feet.

Certain plants close their leaves when touched as a defense response.

The world's largest musical instrument is the Stalacpipe Organ in Luray Caverns, Virginia — it uses stalactites as keys.

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