1.   Following the Popper prescription, Wachtershauser decided the right way to investigate the origin of life was first to construct a theory about how it must have originated.

2.   Officials said they are still investigating the origins of the fires, adding that at least one fire was started by a lost hiker signaling for help.

3.   On Monday, the FBI was still investigating the origins of the Worm bug as computer experts found new ways that it can spread.

4.   Retailers also will face confusion, they say, as they must try to investigate the origins of all name-brand products they buy from distributors.

5.   Scholars of the history of science investigate the origins of science from the early Babylonians and Greeks onward.

6.   Before the auction, experts from the federal archive service investigated the origins of the document, but to little avail, Kozlov said.

7.   Belarusian and Russian security services are investigating the origin of the bills.

8.   He also said the city would investigate the origins of apartments in other neighborhoods besides the Marais where Jews may have lived.

9.   He said a government commission has been set up to evaluate the damage and investigate the origin of the fire.

10.   Hours later, NATO officials said in Brussels the alliance was investigating the origin of the missile.