About This Quiz
It's likely just short of impossible to know exactly how many different forms of life exist on Earth—we keep finding new things every year, even after all this time. So we have to rely on scientists with knowledge of such things to make educated guesses and the best guess right now is that there are probably about 8.7 million different kinds of life on Earth. 8.7 million! Imagine that. Now, a lot of those are going to be plants and other microscopic life forms: things that you wouldn't give a second thought to, really. But not all of them. All of your favorite animals fit in there somewhere, too. The things you find amazing, or terrifying, or adorable. And when they're all together, you'd be able to organize them in all kinds of ways. Including by length. There are some really long creatures out there.
Some animals just have a knack for growing really, really long. Things like island gigantism, in which a creature can grow huge due to being isolated, as well as deep-sea gigantism, in which a creature can grow to massive lengths in the depth of the oceans, are just two factors that can alter an animal's size. Whatever the reason, it happens. So how many of these long animals can you recognize? Take the quiz and see!
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