 Originally Posted by A Roxxor
Uhm. They beat their wings. Really hard. Like most animals that fly.
Actually, it has to do with the specific way their wings move. Insects do not fly the same way larger animals do. Only recently was it discovered that unlike larger animals that either fly by pushing upwards against the air or gliding, insects beat their wings in such a way that little vortices of air are created around their bodies which causes lift. It has been explained, but was a popular mystery for a long time.
Also, the 'spacetime as a rubber sheet' model is just that, a model based on relativity. This model is being challenged a bit by quantum physicists who are looking for a force carrying particle for gravity, or a 'graviton'. If they find it then it changes the rubber sheet model pretty drastically.
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