The discovery of methane in Martian atmosphere announced by researchers last week created a stir in the scientific community. It is believed by scientists the presence of methane in Mars is a clear indication that life could exist or had possibly existed in the planet in the past. However, it must not be forgotten that there are a few processes that can lead to production of methane in the absence of life as well.
The discovery of methane on Mars was made possible by NASA's Curiosity Rover. The robotic exploration of Mars has found that the planet's atmosphere is cold, dry and lacks in atmospheric pressure. However, conditions could be different below ground.