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 ...

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 was Treehugger’s senior editorial director before moving to Martha Stewart. Her writing and photography have been featured in The New York Times, The Guardian, National Geographic, ...