Orchids drive people mad, from wealthy Victorian collectors to one of the most important scientists of the last few centuries. A horticulturist from the Chicago Botanic Garden explains what makes orchids unique and attempts to tease out our obsession with them.
The Sierra Nevada mountains contain the earth's largest living trees, the tallest waterfall in North America, and striking stone monoliths. Nature explores the effects of climate change on this glorious landscape.
WTTW's new web series Urban Nature explores such stories as segregating squirrels, San Francisco's 'wild plan' for safe wildlife movement through the city, and the reclamation by nature of a deserted island near Manhattan.