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Scientists have new things about the atmosphere and environment on Mars. They a "toxic cocktail" of chemicals that would easily any living organism. The chemicals have been on the surface of the Red Planet. The scientists, from Edinburgh University in the UK, the discovery of the chemicals the chance of finding life on Mars has . The scientists are astrobiologists – they the atmosphere and environments in the universe that might life. The researchers said Mars had no Ozone layer, which means there are high levels of ultra-violet (UV) radiation. The mix of UV radiation and the chemicals the Martian landscape.

The scientists what happens when the chemicals found on Mars mix with UV radiation. They it killed organisms very quickly. The chemicals alone were enough to living organisms. However, when the chemicals were with UV rays, the mix killed organisms 11 times faster. The scientists said: "Our observations that the surface of present-day Mars is highly [harmful] to cells, by a toxic cocktail of [chemicals] and UV radiation." They that their research was further evidence that the surface of Mars deadly to any form of plant life. They the chemicals and UV rays , "much of the surface and near-surface regions uninhabitable".

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