Some species of archaea, terrestrial microorganisms living in extreme conditions, is theoretically able to live and to Europe - Jupiter, under the ice "crust" which is a liquid ocean.So say the authors of an article published in the journal Astrobiology.
Jimena Abrevayya (Ximena Abrevaya) from the University of Buenos Aires and her colleagues recreated the surface environment of Europe in the laboratory. Because of its ice-ice-ocean, the moon of Jupiter is often mentioned among the possible "life centers" in the solar system.
Group selected three types of micro-organisms: Archaea Natrialba magadii and Haloferax volcanii, as well as bacteria, "superhero" Deinococcus radiodurans. These types of archaea are so-called halophiles - they live in very salty environments. Same bacterium, whose name translates from the Greek and Latin for "terrible berry that can tolerate radiation" may experience a dose of acute exposure to 5000 Grays almost no loss of viability, and for human lethal dose may be only five Grays.
The researchers subjected organisms to ultraviolet radiation, similar to what they would experience at Europa's surface. Archaea Haloferax volcanii did not survive the radiation, in contrast to the two other species - about 0.1% Archaea and 1% Deinococcus radiodurans successfully held out for three hours of the experiment.
Previously, Deinococcus radiodurans has been repeatedly discussed as a possible "germ of life", a survivor of space travel and is listed on the Earth by meteorites. Now, as the authors note, a number of potential "travelers" can be enabled and archaea Natrialba magadii - with the stability of this large group of microorganisms to the conditions of outer space have been studied sufficiently well.
The commentary Portal Technology Review, three hours, during which time the experiment was not enough to say with certainty about the ability of archaea and bacteria to survive an accidental hit from Earth to Mars or Jupiter in the region - on this trip will leave tens of thousands of years .
However, Mars and other space objects could well be "infected" by them through bad sterilized spacecraft, for example, the Vikings sent to the Red Planet's surface in the 1970s.
For those traveling to a few years or even months, that "travelers" may well cope, writes portal.
In May it was reported that on Jupiter's moon found the sea of lava.