Mars - Is life possible there

                                   MARS

We know enough of MARS so I dont think I need to give information over MARS . My today's blog mainly focuses on evidence of life in MARS . Yes evidence like fossils were found of small  creatures .  Extremely small creatures . Second prooof is that there is hollow like where through for many years river flowed . Yes till now it is there , No soil has take its place .

The first spacecraft to successfully land on Mars, NASA's Viking 1, began a mystery that remains tantalizingly unsolved: Is there evidence of life on Mars? Viking represented the first and so far only attempt to search for life on Mars, and its findings are hotly debated today. Viking had detected organic molecules such as methyl chloride and dichloromethane. However, these compounds were dismissed as terrestrial contamination — namely, cleaning fluids used to prepare the spacecraft when it was still on Earth.

The surface of Mars is very hostile to life as we know it, in terms of cold, radiation, hyper-aridity and other factors. Still, there are numerous examples of life surviving in extreme environments on Earth, such as the cold, dry soils of the Antarctic Dry Valleys and the hyper-arid Atacama Desert in Chile.

There is life virtually wherever there is liquid water on Earth, and the possibility that there were once oceans on Mars leads many to wonder if life ever evolved on Mars and, if so, whether it might be extant. Answering these questions might help shed light on how common life may or may not be in the rest of the universe .

Meteorites discovered in Antarctica that came from Mars — blasted off the Red Planet by cosmic impacts — have structures that resemble ones made by microbes on Earth. Although much research since then suggests chemical rather than biological explanations for these structures, the debate continues. These findings do raise the tantalizing possibility that life on Earth actually originated on Mars long ago, carried here on meteorites.

To answer whether or not life did or does exist on Mars, people might actually have to go there and find out.

NASA's plan as of 1969 was to have a human Mars mission by 1981 and a permanent Mars base in 1988. However, interplanetary human voyages pose definite scientific and technological challenges. One would have to deal with the rigors of travel — issues of food, water and oxygen, the deleterious effects of microgravity, potential hazards such as fire and radiation and the fact that any such astronauts would be millions of miles away from help and confined together for years at a time. Landing, working, living on another planet and returning from it would offer a host of challenges as well.

Nevertheless, astronauts seem eager to find out. For example, this year six volunteers lived in a pretend spacecraft for nearly a year and a half in the so-called Mars500 project, the longest spaceflight simulation ever conducted, aimed at replicating a manned mission to Mars from beginning to end. There are even numerous volunteers for a one-way trip to the Red Planet. Tiny rock-eating microbes could mine precious extraterrestrial resources from Mars and pave the way for the first human colonists, and farmers could grow crops on its surface. The mystery as to whether or not humans will ever go to Mars may rest largely on whether or not the powers-that-be can be convinced to go there.

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