500px is a photographic community powered by creative people from all over the world that lets you share and discover inspiring photographs.

HISTORY is the leading destination for revealing, award-winning original non-fiction series and event-driven specials that connect history with viewers in an informative, immersive and entertaining manner across multiple platforms.

For the last 50 years our mission has been to stop the degradation of the planet's natural environment and to build a future in which humans live in harmony with nature.

As the largest animal rights organization in the world, People for the Ethical Treatment of Animals (PETA) operates under the simple principle that animals are not ours to eat, wear, experiment on, or use for entertainment. To learn more about PETA, check out http://www.peta.org/. Please follow OfficialPETA on StumbleUpon to learn about breaking investigations, vegan recipes, cruelty-free lifestyle tips, ways to take action, and much more. OfficialPETA stumbles pages from PETA.org, peta2.com, and other websites.

Animal Planet is at the electrifying intersection of humans and animals, a common, elemental life force is at work. You can feel it in the stories we tell and see it in the characters who bring them to life. The result is an entertainment bonanza of comedy, tragedy, fear, love and loathing. Plus cute cat photos!