1.   But the discovery of possible fossil microbes in a Martian meteorite has raised the possibility that primitive life emerged there about the same time it did on Earth.

2.   Last year, however, a scientific team reported finding possible fossil microbes in a meteorite from Mars.

3.   McKay leads the team of scientists who, last August, reported the discovery of possible fossil microbes in the Mars rock.

4.   Those suspicions reached fever pitch a year ago this Thursday, when scientists announced the discovery of possible fossilized microbes in a meteorite that fell to Earth from Mars.