Numbers: Apr. 17, 2006

445 Tornadoes reported in the U.S. in 2006 as of last week, about five times the average by this time of year over the past decade

23 People killed by twisters in western Tennessee, the worst one-day toll in the U.S. since 1999

9,000 Years ago that humans first had holes drilled into their molars, according to analyses of nine bodies found in Pakistan, adding four millenniums to the known history of dentistry

160 Estimated number of years that dentists and doctors have been using anesthetic

$1.13 million Prize money to be paid to each French Open singles champion this year,...

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