Identification Memes

Finally, a cheat sheet for those who can't tell their prehistoric nightmares apart! Next time you're being chased through a swamp, just politely ask the reptile to smile. If only top teeth are visible, you've got about 30 seconds to write your will. If top AND bottom teeth show, well... I hope your affairs are already in order. Evolution really said "let's make the same terrifying creature twice but with slightly different dental plans."