Bats: they’re humanity’s closest flying relatives. Is that true? I have no clue, I just run my mouth trying to sound convincing until somebody tells me to shut it, threatens to punch me, or punches me. This is a video from BBC Two of bats flying in both slow motion and some x-ray footage to reveal the secrets of their flight. And what secrets they are! So, if you were wondering what Batman watches when he’s feeling sexy at night all alone in the Bat Cave, this is it. “But I tho–” Well you thought wrong, Robin.