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Plus: octopus fun facts and how your brain changes over time!

Plus: goldfish super memories and Egyptian mummies!

Plus: giraffes and why Roman concrete keeps getting stronger!

Plus: 2,000 lb pumpkins, beavers, and why we have baby teeth!

Plus: bats, why the sky is blue, and growing soap!

Plus: polar bears, where hurricanes come from, and comedy wildlife finalists!

Plus: eliminating food allergies, Japanese fairies, and the world's most endangered animal!

Plus: hummingbirds, treatment for Huntington's, and a polka-dotted zebra!

Plus: the surprising benefits of zebra stripes, this year's Nobel Prizes, and pufferfish skeletons!

Plus: the health benefits & risks of space, pictures from Mars, and giant dinosaur poo!

Plus: our longer days, myths about our brains, and bringing back the dire wolf!

Plus: growing Mount Everest, and a man who was hit by lightning 7 times!

Plus: special hippo sweat, smart goldfish, and explaining genome editing!

Plus: steak in space, myths about bats, and Einstein!

Plus: radioactive bananas, keystone species, and myths about the Great Wall of China!