eli5: Why is it not possible to build bird-like attachable wings that account for body proportions to allow humans to fly or glide around?
In: 2102
Probably other people can give better more detailed answers, but for birds everything in their bodies is built to fly. Their bones are lightweight and they have feathers, their muscles are designed to power wing movement. Humans are simply too heavy and our shoulder muscles too weak to ever fly like that.
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