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Crash Course Zoology
Phylogenetic Mysteries
Season 1
Episode 12
There are so many more questions we have yet to answer in Zoology so grab some fossils, fire up the DNA sequences, and bring your best hypothesis as we try to figure out where all the baby eels are, explain why spiders seem so lonely, and decide once and for all if horseshoe crabs are arachnids!
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14:56
So what is an animal anyway?