>To move something in the air inherently uses more energy than any sort of ground transport … if the object is heavy. Bats hit 99.5 mph in level flight: https:

>To move something in the air inherently uses more energy than any sort of ground transport … if the object is heavy. Bats hit 99.5 mph in level flight: https://www.audubon.org/news/the-common-swift-no-longer-fastest-flying-animal https://www.audubon.org/news/the-common-swift-no-longer-fast...