Assertion: bat's flight | /r/HasProperty | powered
Facets:
Source sentences:
text: Bats are the only group of mammals to have evolved powered flight (although many species glide), and only the third vertebrate group to do so.
text: Bats are the only form of mammal to have attained powered flight.
text: Unlike flying squirrels and flying snakes, which, despite their name, actually glide from one tree to another, bats are actually capable of powered flight.