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[Music] so several weeks ago i was approached by paleocuriosities on instagram and asked if i would like to take part in a collaboration he wanted to create a theme week where i along with other content creators would talk about different animals that interest us that share something in common and if you follow me on social media or if you've read the title of this video then you already know what the common theme is for this week now i recently talked about how air sacs allowed dinosaurs to become the biggest animals on land and it also allowed some species to gain the ability of flight eventually leading to the birds but flight is expensive when you see a bird or a bat flying through the air you're watching an animal that has devoted a huge amount of its biology to that one act everything else that the animal does has to work around the fact that its body has to be built to do that one thing however in the case of gliding animals like a sugar glider they onl