Think of every animal you can. Tigers, goldfish, hummingbirds, elephants, dogs, humans—the list goes on and on. Now add in every extinct animal you can think of—T. rex, wooly mammoths, pterodactyls. The number of animals that have lived on earth over its long history is staggering—and the very biggest one known to science happens to be sharing the earth with us right now. Blue whales aren’t just the biggest animals in the ocean, or even the biggest animals alive today—they’re the biggest animals, living or extinct, that have ever been discovered. They’re around a hundred feet long and weigh in the neighborhood of 400,000 pounds. When you think about how old the earth is and how relatively recently humans are to the planet, it’s incredible that we get to share the world with the biggest animal that’s ever lived on it!blue whale

Photo courtesy of NOAA Photo Library.

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