Sure, there are physical differences but outside of mammals, the terms "male" and "female" take on different meanings.
Why not 5 or 15? Why is 10 the magic number when it comes to fingers and toes?
Scientists have always struggled with this riddle...however, new research is giving some clues to the answer.
Botflies are parasites that deposit larvae inside the noses of their hosts, including reindeer. To adapt, the deer learn elaborate behaviors to avoid the flies.
Learn how whales became sailors on this Moment of Science.
Scientists think there are a number of reasons why young animals leave home. By doing so, they avoid competing with their relatives for resources.
Whales must have evolved from some other larger, ancient creature, right? However, sometimes evolution takes unexpected twists.
Have you heard that the long-beaked echidna, which scientists thought was extinct, has been found again in New Guinea? Learn more on this Moment of Science.
Sure your cat's whiskers are cute but do they serve a more practical purpose?
What is the biggest living animal? An elephant? Not even close. Learn more on this Moment of Science.