A dolphin's flipper is made up of five distinct bone structures, similar to that of a human hand.
Male dolphins are called bulls, female dolphins are called cows and baby dolphins are called calves.
Baleen whales don't have ears, they hear through the vibrations picked up by the bones in their skull.
The ocean sunfish can lay up to 300 million eggs at a time. Being the heaviest bony fish in the world, their weight may reach 2,200lbs (1,000kg).
The average resting adult consumes about the same amount of energy as a 100 watt light bulb; that's more than 600 AA batteries per day.
The blue whale is the loudest animal on earth. A blue whale call can travel hundreds of miles across the water, and it is louder than an F18 jet fighter.
Dolphins sleep with only one side of their brain, keeping one eye open and one eye closed. They surface every 20 to 30 minutes to breathe, and they are never totally unconscious while sleeping.
It's a common belief that humans use only 10 percent of their brains. MRI imaging has shown that humans actually use most of their brain, even while sleeping.
The human sneeze can travel faster than 100 miles per hour (160 km/h). It is not recommended to hold back a sneeze, as the extreme pressure may cause ear damage.
The human body cannot produce vitamin C, an essential nutrient. To ensure adequate levels of vitamin C it must be consumed daily.
Research has shown that frequently cracking your knuckles increases your chance of hand swelling and lowered grip strength.
In Laguna, Brazil, dolphins help fishermen to catch fish. The dolphins round up the fish and signal the fishermen to cast their nets. More than 200 families rely on the daily catch.
If you took the DNA strands out of all the cells in your body and stretched them out in a single line, they would circle the earth five million times.