Most bats are right-handed.
Why it is true
Most bats are left-handed. Studies show that about 70 percent of bats preferentially use their left paw to grip and climb. This laterality may be linked to how the brain processes space.
Source: Journal of Mammalogy
Would you rather be asked first?
This is the reading side of the site, so the answer is in the sentence above — that is the whole point of it. Test yourself works the other way round: the question comes on its own, and the fact and the explanation only appear once you have answered.