Earth-based lifeforms known as lichens may be tough enough to survive on Mars, a new study suggests.
Scientists came to this conclusion after blasting the lichens with a year's worth of Martian radiation in less than a day during a lab experiment — and the terrestrial lifeforms survived the process.
Mars is not an easy place to live. The Red Planet is essentially one giant desert with a minimal atmosphere, low temperatures and no liquid water at its surface. But the biggest barrier to life on Mars is the lack of a strong magnetic field, which protects against the constant bombardment of ionizing radiation from cosmic rays and solar flares, which can damage living cells and mutate their DNA.
One group of living things that may be able to survive these extreme conditions is lichens, symbiotic associations between fungi and photosynthetic bacteria and/or algae. These hybrid lifeforms, which are not considered true organisms but are listed as species on the three of life, work together to stay alive and many are extremophiles, capable of tolerating no hydration and extreme temperatures for long periods. Some species have even survived being directly exposed to the vacuum of space.
To read more, click here.