But a cell too tiny to contain ribosomes may still be big enough if it uses RNA instead of proteins to carry out biochemical reactions, says Steven Benner, an astrobiologist
at the Foundation for Applied Molecular Evolution in Alachua, Fla.
said that Mars was once a warm planet and liquid water existed on its ground.
, she says, look at the big picture: the planet's orbit, its composition and the presence of oxygen in conjunction with other gases produced by life such as methane.
Tempe, AZ, February 05, 2014 --(PR.com)-- Controversial astrobiologist
Richard Hoover and his colleagues at the Centre for Astrobiology at the University of Buckingham have been making worldwide headlines for years due to their claims that scientists have already obtained valid evidence of extraterrestrial life.
Indeed, research by astrobiologist
William Bains of Cambridge University in the United Kingdom suggests that, if life has managed to evolve on that moon's surface, it would be truly bizarre, smelly, and explosive compared to the life Earthlings are used to.
NASA have always opposed the claim that their data found microbial life on Mars, however, two NASA astrobiologists
have publicly stated otherwise and I have worked with them to bring attention to their finds."
Grinspoon alludes to "developing a new global energy system that does not wreck the natural systems...." (He doesn't tell us how this will work--but presumably he and other astrobiologists
like to use electricity when the Sun isn't shining and the wind isn't blowing.) Then he calls for stabilizing the world's population, building a planetary defense system against impacts, and preparing for the eventual burnout of the Sun.
regard Europa, which is about 1,900 miles (3,100 kilometers) wide, as one of the best bets in our solar system to host life beyond Earth.
have identified such molecules as characters in the story of life's origins, and there's abundant evidence that they can survive in space.
In order to find evidence of life, astrobiologists
will have to look even further back in Mars' history when liquid water existed for much longer periods.
Engineers, pilots, physicists, astrobiologists
, and, yes, artists, too, have helped further the mission of the space agency.
will today continue to examine traces of matter that poured its blood-red deluge over the Indian state of Kerala for two whole months in 2001.