Tag Archives: biology

Russia blasting biomass at Martian moons

Earth-Mars montageWhile the Western world waits to see what President-Elect Obama does with the US space program, the Russians are getting busy with a Mars mission of their ownDue for launch in October, the charmingly-named Phobos-Grunt mission will be robot-manned, of course, but there will be earth lifeforms aboard, albeit very tiny ones:

LIFE [Living Interplanetary Flight Experiment] is intended to help better understand the nature of life, its robustness, and its ability – or not – to move between planets. The journey will be a test of one facet of the “transpermia” hypothesis. That is, the possibility that life can voyage from planet to planet inside rocks blasted off one planetary surface by impact, to land on another planetary surface.

Don’t worry, though; they’re not going to break the 1967 Outer Space Treaty by infecting Mars with Earth biology. Or at least they’re not going to do it deliberately – but that’s not stopping a few NASA types getting a bit hot under the collar about the whole business:

… I am uncomfortable with sending native tundra samples so close to Mars, because this is a location on Earth that could possibly contain organisms capable of adapting to Martian conditions,” and to do so “seems ill-advised,” Conley told SPACE.com.

Well, we surely don’t want to corrupt Mars with Earth microbes if we can avoid it. But how much of that discomfort is rooted in the Planetary Society using a Russian mission arther than a NASA one, I wonder? [superb montage image by Bluedharma]

Attack of the giant self-propelled undersea amoebas!

Sea grapes on the move make like Fred Durst - rollin', rollin', rollin'.A new discovery from the world beneath the ocean waves: a single-celled organism the size of a grape that rolls along the sea-bed like some sort of aquatic tumbleweed. [image credit Sönke Johnsen; borrowed from linked article]

The researchers said that it’s possible that the sea grape may be a descendent of the creature that made the tracks that are well known from the fossil record. Or – like the tuatara or the coelacanth – the protist could be a living fossil, that has changed little for as many as 1.8 billion years.

I.8 million years is a long time – time enough, apparently, to allow even rocks and minerals to evolve. [via SlashDot]

The lone survivor: single organism ecosystem discovered

Scientists has discovered a new bacterial organism called desulforudis audaxviator that is an entirely self-sufficient ecosystem in and of itself, 2.8 km below the Earth’s surface the desulforudis audaxviator’s genome contains:

everything needed for the organism to sustain an independent existence and reproduce, including the ability to incorporate the elements necessary for life from inorganic sources, move freely, and protect itself from viruses, harsh conditions, and nutrient-poor periods by becoming a spore.

This is a beautiful discovery, and a testament to the diversity and splendour of Life. Also, it suggests there is no theoretical reason why life cannot survive in similar conditions on other planets:

“One question that has arisen when considering the capacity of other planets to support life is whether organisms can exist independently, without access even to the sun,” says Chivian. “The answer is yes, and here’s the proof. It’s sort of philosophically exciting to know that everything necessary for life can be packed into a single genome.

[image from eschipul on flickr]

First ‘synthetic tree’ created

metal tree sculpture“I think that I shall never see / a poem as lovely as a tree.

Indeed, if they were all this small / we’d never see no trees at all… “

Proving a long-held theory that transpiration in trees is a physical process rather than a biological one, the world’s first synthetic tree isn’t much to look at… hell, you’d need a microscope to really make out the detail.

What use is a synthetic tree, anyhow? Well, it:

… should also be a useful platform for the study the properties of metastable liquids and a starting point from which to design new technologies for the management of water in chemical processes, heat transfer, and environmental engineering.

Water management, eh? Euphemistically speaking, I think that may be a fairly big business in a few decades. [image by SweetOne]