Martin Schongauer: The Archangel Gabriel, 1490/1491, engraving
Yay! Sam Brownback is... back! He's super-worried about human-animal hybrids, which are bad, except it's fully OK to get you some pig heart valves 'n' such. Standards! What we need are some human-animal hybrid standards in here! Brownback is right. I, for one, don't want to get run over by a centaur on my way to Target.