What do tropical lizards and polar bears have in common? Camouflage - the ability to adapt their appearance to their environment. Learn how camouflage works, how it helps animals survive and what different types of camouflage look like.| HowStuffWorks
Explore the world of wild animals, pets and extinct species. Learn about ants, dinosaurs, mammals and everything that crawls, swims or flies under the sun.| HowStuffWorks
By the time the oldest human dies, odds are there's a giant tortoise out there somewhere who'll live twice as long as they did. Hailing from the Indian Ocean and the Galapagos islands, giant tortoises have been one of the most durable and long-living species for centuries upon centuries.| HowStuffWorks