Fruit flies were the very first animals we sent into space, way back in 1947 — yet we're still not done analyzing what happens to them in microgravity. We've known for a while that when in "zero-gravity," flies walk more quickly than they do planetside. The only problem is that we don't know if this is due to the whole gravity thing, or if the flies are reacting to the launch preparation and extreme forces they're hit with on the way up.
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