In front of the NASA news conference scheduled for 11:00 AM Pacific time, reliable news is finally leaking. A science correspondent for London’s Telegraph quotes an astrobiologist as saying this about a bacterial discovery in Mono Lake on the eastern side of the Sierra mountains in California:
Dr Lewis Dartnell, an astrobiologist at the Centre for Planetary Sciences in London, said: “If these organisms use arsenic in their metabolism, it demonstrates that there are other forms of life to those we knew of.”
“They’re aliens, but aliens that share the same home as us.”
Exciting stuff. But there’s an “if” buried in Dr. Dartnell’s comment, isn’t there?