Iron ‘blueberries’ may be sign of microbial life on Mars

[Judi Lynn]

Iron ‘blueberries’ may be sign of microbial life on Mars

Small spherical ‘blueberries’ found in Martian rocks may have been formed by microbes, indicating that life existed on Mars in the distant past.

Tim Dean (Australian Life Scientist)
13 September, 2012 10:41

It’s unlikely anything lives on Mars today, but it may well have done so millions or billions of years past. And it may have left traces of its existence in the geology of the red planet.

One such tantalising hint was discovered by the NASA Opportunity Rover, which found small spherical hematite balls, dubbed ‘blueberries,’ in the Martian soil.

These were originally thought to have provided the first evidence of liquid water on Mars, but their existence may hold an even more profound implication.

Now researchers from the University of Western Australia and University of Nebraska have found that such iron-oxide spheroids, when they appear on Earth, are formed by microbes.

More:
http://www.lifescientist.com.au/article/436306/iron_blueberries_may_sign_microbial_life_mars/

[sofa king]

1. Interesting.

They remind me a little bit of ooids, which do not form directly from living things but which require living things to provide the proper ratio of chemical components in the water.