Scientists have found chemicals on Mars. They can kill living . The chemicals mean the of finding on Mars is very . Mars has no ozone , so there is a lot of ultra-violet (UV) . The UV rays and the chemicals make it for to grow on Mars.
Just the are enough to kill living . When they mix with UV , they kill things 11 faster. The scientists said their research shows that the on Mars is . They say the chemicals and UV rays mean that can grow or live on the or the land on Mars.