Spiders with brains that spill into their legs, sea squirts that eat their own neurons and super-smart crows: these 13 animals have fascinating brains.

These works of art made of driftwood, dandelions, leaves, pine cones and other natural materials celebrate the beauty of nature.

Technology, biology and horticulture come together in an unusual interactive exhibit that invites visitors to help algae grow with their breath.

Western Australia's Hutt Lagoon is pink as a blushing bride and saltier than a sailor on shore leave, thanks to an abundance of beta carotene-producing algae.

Tinted by toxins and flushed of fish, the startling hues of these 10 ravaged rivers are red cards against those who mismanage these precious resources.

Kelvin-Helmholtz clouds are a rare and often spectacular weather phenomenon whose rolling, wavy appearance can be both beautiful and frightening.

Thundersnow: Marvel superhero or heavy metal band? Neither, actually, though the name of this rare aspect of winter weather sounds as awesome as it is.

Catch a buzz? These 7 bee-friendly urban beehives are ideal for anyone who wants to invite a little urban wildlife into their nature-challenged neighborhood.

Stumped on gift ideas? Consider giving a great deed instead, donating to one of these 14 charities in your recipient's name.

The exciting New7Wonders campaign that ended on November 11th, 2011 raised awareness of the Earth's natural beauty and in that respect, everyone's a winner.

The New7Wonders of Nature campaign has winnowed 440 prospects down to just 28 "Official Finalist Candidates" with voting scheduled to end on November 11, 2011.

An abundance of animals bear the burden of doubly descriptive names. An identity crisis in the making? The animals aren't saying so it's up to us to decide.

The earth is bright and beautiful, but it is also dark and frightening, as shown by these 15 shiver-inducing landscape photos of storms, forests and more.

These 14 botanical gardens and parks, from Scotland to Costa Rica, represent some of the most beautiful mash-ups between wild nature and human cultivation.

These 10 extinct species are certainly gone but they're not forgotten, and they may not even be gone for good if biological technology continues to advance.