Humans don't have hollow bones like birds do, so how big would our wings have to be to lift us off the ground?

“Larger birds such as geese, ducks, and gulls fly to a height of hundreds of meters due to the large-scale discharge of fireworks and remain in the air for up to an hour,” Mr Hoekstra observe ...

but occasionally in buildings and bird houses. Beechnuts, acorns, hickory nuts, and other large seeds which southern flying squirrels begin storing in late summer in their nests, the ground, and in ...