Feeds

Martians lived underground, say Oz boffins

Water and energy available but not on the surface

Business security measures using SSL

A group of Australian scientists have created a “whole of planet” model that suggests large parts of Mars are capable of supporting life – as long as it doesn’t mind living underground.

Instead of the piecemeal approach followed by most astrobiologists – which, it must be said, is fair enough since the various probes sent to the Red Planet have only sampled tiny areas – the Australian National University team led by Dr Charlie Lineweaver sought to compare what’s known about the whole planet to Earth’s environment.

They focused on two characteristics, comparing the temperature and pressure conditions here to those likely to exist on Mars. Their estimate comes up with a surprise: while only one percent of Earth’s entire volume falls under the heading “habitable”, Mars beats us at three percent.

"What we tried to do, simply, was take almost all of the information we could and put it together and say 'is the big picture consistent with there being life on Mars?'," the astrobiologist told AFP.

Unlike Earth, most of Mars’ habitable zone is underground, Lineweaver says. That’s because water on the surface evaporates due to the low atmospheric pressure (in spite of the rather chilly surface temperatures of around -63 degrees Celsius).

It extends quite a distance underground, in fact: the Martian "pressure-temperature phase space" (that is, the combination of pressure and temperature suitable for liquid water) extends to around 310 kilometers underground, the paper states.

"If there is a hot deep biosphere on Mars, it could extend 7 times deeper than the ~5km depth of the hot deep terrestrial biosphere in the crust inhabited by hypothermophilic chemolithotrophs," the paper continues.

The model found that underground, the extra pressure would allow water to exist as a liquid, and heat from the interior would create conditions "that could be habitable by Earth-like standards by Earth-like microbes".

The paper, An Extensive Phase Space for the Potential Martian Biosphere by Lineweaver, along with Eriita Jones and Johnathan Clarke, is published in Astrobiology. ®

Providing a secure and efficient Helpdesk

More from The Register

next story
PORTAL TO ELSEWHERE scried in small galaxy far, far away
Supermassive black hole dominates titchy star formation
Boffins say they've got Lithium batteries the wrong way around
Surprises at the nano-scale mean our ideas about how they charge could be all wrong
Bacon-related medical breakthrough wins Ig Nobel prize
Is there ANYTHING cured pork can't do?
Edge Research Lab to tackle chilly LOHAN's final test flight
Our US allies to probe potential Vulture 2 servo freeze
Europe prepares to INVADE comet: Rosetta landing site chosen
No word yet on whether backup site is labelled 'K'
Cracked it - Vulture 2 power podule fires servos for 4 HOURS
Pixhawk avionics juice issue sorted, onwards to Spaceport America
'Duck face' selfie in SPAAAACE: Rosetta's snap with bird comet
Probe prepares to make first landing on fast-moving rock
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
WIN a very cool portable ZX Spectrum
Win a one-off portable Spectrum built by legendary hardware hacker Ben Heck
Saudi Petroleum chooses Tegile storage solution
A storage solution that addresses company growth and performance for business-critical applications of caseware archive and search along with other key operational systems.
Protecting users from Firesheep and other Sidejacking attacks with SSL
Discussing the vulnerabilities inherent in Wi-Fi networks, and how using TLS/SSL for your entire site will assure security.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.