Timelapse: Braces Straightening Teeth
Prepare to be mesmerized, slightly horrified, and then say "Huh—those really work!" This short video shows 18 months in the life of an 11-year-old girl's dental braces. The most surprising thing for me (having never had braces as a kid) was the immediate thought: Maybe I should get adult braces and make an internet video.... Yeah, maybe next year. Enjoy.
See also: A Brief History of Braces.
(Via The Kid Should See This and Commander Chris Hadfield.)