In 2004, radio shock jocks Lex Staley and Terry Jaymes published an "Olsen Twin Jailbait Countdown Clock" online. It wasn't the only online countdown to Mary-Kate and Ashley's 18th birthday. And when ...

Part of the reason is the time period in which it arose. The Maya Classic period, spanning from about A.D. 250 to 900, represents the civilization’s peak.