I guess hair, because that's a pretty natural occurrence, but I always figured the brows and especially lashes were underrated workhorses of our bodies.
Jelly beans or Cadbury Creme Eggs?
Jelly beans or Cadbury Creme Eggs?
"For me, it is far better to grasp the Universe as it really is than to persist in delusion, however satisfying and reassuring." - Carl Sagan