Colder, higher, faster: The Winter Olympics’ most extreme moments in three charts

By Alex Leeds Matthews, CNN (CNN) — Competitions at the Winter Olympics are defined by extremes: extreme air, extreme speed and extreme temperatures. On sliding tracks, athletes in luge, bobsled and skeleton break highway speed limits. In the halfpipe and big air competitions, snowboarders hit huge jumps, completing dizzying numbers of spins while airborne. They