7 Discoveries Scientists Made by Licking Things

You probably know not to lick something unfamiliar. But there are actually a surprising number of discoveries that have been made because scientists licked things.
Chapters
CONSTANTINE FAHLBERG
0:59
1-3 ARTIFICIAL SWEETENERS
3:03
SALT & VINEGAR GRASS
3:21
HOODED PITOHUI Credit: markaharper
5:11
A POISONOUS BIRD
5:21
THE PROPERTIES OF ELEMENTS
8:42