Volcanic lightning is caused by static electricity from ash particles colliding during eruption.

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

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

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

The invisible hand, described by Adam Smith, refers to the self-regulating nature of the marketplace through supply and demand.

The United States has lost half its wetlands since European settlement — reducing flood protection and wildlife habitat.

Trees in a forest share resources through mycorrhizal networks — mother trees can send carbon to seedlings in shade.

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

The Tokyo Skytree is one of the tallest towers globally.