We are inhabited by as many as ten thousand bacterial species; these cells outnumber those which we consider our own by ten to one, and weigh, all told, about three pounds - the same as our brain.

Lyme disease is the most commonly reported tick-borne illness in the United States, and the incidence is growing rapidly. In 2009, the C.D.C. reported thirty-eight thousand cases, three times more than in 1991. Most researchers agree that the true number of infections is five to ten times higher.

If you saw him, he's a skinny little kid; I bet he doesn't weigh 100 pounds. It's impossible that he's a ringleader of anything.

My brain cells are dying in their trillions.

My New Year's Resolution List usually starts with the desire to lose between ten and three thousand pounds.

He doesn't weigh but 96 pounds. Even though he went 4-4 he didn't give up in any match.