Was there life on Mars?
發佈時間:2013-05-21
瀏覽次數:3847次
Researchers have discovered rocks that could contain the fossilised remains of ancient life on early Mars.
The team made their discovery in the ancient rocks of Nili Fossae on the planet’s surface, which they say are almost identical to rocks in the
Pilbara region of north-west Australia where some of the earliest evidence of life on Earth has been preserved.
The findings could mean that is evidence of living organisms on Mars around 4 billion years ago buried on the planet`s surface.
Scientists from the Search for Extraterrestrial Intelligence Institute (Seti) used infrared light from an instrument on the Mars Reconnaissance
Orbiter to study the Nili Fossae rocks.
They then used the exact same instrument to study the Pilbara rocks in Australia.
Scientists had first discovered that the Nili Fossae rocks contained carbonate in 2008.
Carbonate is formed when the shells and bodies of dead animals are buried and preserved.
Now they have discovered that the ancient rocks on Mars and in Australia share many similar minerals.
The similarities between the two sets of rocks in terms of carbonates is important because Pilbara is used to study the early stages of life on
Earth 3.5 billion years ago.
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