Despite their name, killer whales (orcas) are actually dolphins.

Strange discoveries are normal in the largest rainforest on Earth, from the thousands of Amazonian "Stonehenges" to the world's largest snake ever found on record that was recently discovered in the ...

How big they are: From 5 to 32 feet (1.5 to 10 meters) long, depending on the species Dolphins live in almost every ocean, except most tend to avoid the cold waters in the Arctic and around Antarctica ...