"You have all heard of a smoking gun. This is a squirting gun."

Ken Edgett, staff scientist at Malin Space Sciences in San Diego, on photographic evidence of sporadic gushers of water on Mars. The presence of water raises the possibility of some form of life on Mars.

"This is not your father's Apollo."

John Logsdon, director of the Space Policy Institute at George Washington University, on NASA's plans, announced last week, to establish a permanent international base camp on the moon. NASA declined to estimate the cost of the camp but last year said that a trip back to the moon would cost $104 billion.

"It's a value system, a belief system."

Whole Foods Markets Inc. co-founder John Mackey, telling The Wall Street Journal that the "organic-food lifestyle" is not a fad "any more than Christianity is a fad for Christians."

"It sounded like when I was in Vietnam, incoming mortar rounds."

David Mays, 61, on a Dec. 6 explosion at an industrial warehouse in Milwaukee that killed three people and injured 37. Investigators said a leak in a large propane tank may have caused the blast.

"I knew I was getting old, but I didn't think I would be with the dinosaurs so soon."

Sylvester Stallone, after donating memorabilia from his Rocky movies to the Smithsonian.