Altruism — acting for others' benefit at a cost to yourself — challenges purely self-interested models of human nature.

Ants that are infected by a certain fungus climb plants, clamp onto a leaf, and die — allowing the fungus to sporulate.

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

Ball lightning is a rare phenomenon of glowing spheres of light that drift through the air — its cause is still debated.

The baobab tree can store up to 120,000 liters of water in its trunk to survive droughts.

The kinkajou uses its 13 cm tongue to reach nectar in flowers — acting as an accidental pollinator.

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

The Boston Molasses Flood of 1919 sent a wave of molasses through Boston streets.

A sneeze travels faster than a Category 1 hurricane.