Directory For a Sex Photos : fuckyeahfluiddynamics: Birds generate extra lift with their tails, according to new measurements of gliding owls and raptors. Also, look at these gorgeous wingtip vortices! (Image and research credit: J. Usherwood et al.; video credit: Nature News;

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» fuckyeahfluiddynamics: Birds generate extra lift with their tails, according to new measurements of gliding owls and raptors. Also, look at these gorgeous wingtip vortices! (Image and research credit: J. Usherwood et al.; video credit: Nature News;

fuckyeahfluiddynamics: Birds generate extra lift with their tails, according to

fuckyeahfluiddynamics: Birds generate extra lift with their tails, according to

fuckyeahfluiddynamics: Birds generate extra lift with their tails, according to

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