Scientists have been researching the source of water on earth for a long time - and believe it came from a combination of two places.
The discovery in the Pilbara of the oldest evidence of land-based life could help in the search for life on Mars.
Fossils discovered by UNSW scientists in ancient hot spring deposits in the Pilbara have pushed back by 580 million years the earliest known evidence for microbial life on land.
India's mission to Mars will search for methane and could reveal an important aspect about the history of water on the red planet, writes Malcolm Walter.
I have been searching for evidence of extra-terrestrial life since the 1980s. I believe that we will probably find it, writes Malcolm Walter.
Ever wondered what it would be like on the Red Planet? You can see the next best thing right here in Australia's vast and ancient desert regions.