These skyscraping superstars are the stalwart examples of their species Trees have many interesting features and uses, but it's perhaps their height that inspires the most reverie. Humans may have a ...

The Cairo Fossil Forest is the second oldest in the world. These forests mark a turning point in Earth's history because they changed the composition of the atmosphere, scientists say.

This article is republished from The Conversation, an independent and nonprofit source of news, analysis and commentary from academic experts. Ian Smith is a Research Scientist in Earth & Environment ...

Melissa Breyer is Treehugger’s former senior editorial director. Her writing and photography have been featured in The New York Times, The Guardian, National Geographic, Audubon Magazine, and ...