21.   Might some of those at some time carried some Martian life to Earth?

22.   Mission to Mars, which opens today, features not just Martian life but super-intelligent Martian life that supposedly started life on Earth.

23.   Mission to Mars, which opens today, features not just Martian life, but super-intelligent Martian life that supposedly started life on Earth.

24.   No one yet claims that the case for Martian life has been proved decisively, nor that it has been ruled out.

25.   Only by finding such tiny cell walls, biologists had said, were the meteorite scientists likely to dispel skepticism toward claims of detecting evidence of Martian life.

26.   Researchers from the California Institute of Technology offered new support Thursday for the claim by NASA scientists that a meteorite holds fossil evidence of primitive Martian life.

27.   The rock has not yielded evidence of past Martian life.

28.   The Viking Mars landers dealt a double setback to Martian life.

29.   Water once flooded Mars and could explain the evidence of possible Martian life found recently in a meteorite that landed in Antarctica.

30.   He bluntly told the news conference audience that NASA did not have credible proof of Martian life.