16.This is the Dale Creek Bridge, an bridge built in Wyoming in the 1800s that was so rickety that trains had toslowdown to 4 miles per hour to cross it safely:#
17.This is selection of prosthetic face parts designed for World War I veterans:#
18.Bookworms are not only REAL, this is the kind of damage they can do to a poor, defenseless book:#
19.This is what the fang of a ball python looks like after it bites you:#
20.Back when people were so inclined to do so, this was one way to board and travel by blimp:#
21.And, finally, this is what 46 four-leaf clovers look like:#