Scientists find a ‘hint of life’ on Saturn’s moon Titan

Scientists have found evidence that there is life on Saturn’s biggest moon, Titan.
They have discovered clues that primitive aliens are breathing in Titan’s atmosphere and feeding on fuel at the surface.

The startling discoveries, made using an orbiting spacecraft, are revealed in two separate reports.

Data from Nasa’s Cassini probe has analysed the complex chemistry on the surface of Titan – the only moon known to have a dense atmosphere.

Its surface is covered with mountains, lakes and rivers which has led astronomers to call it the most Earthlike world in the solar system.

Organic chemicals had already been detected on the 3,200-mile wide planet. But the liquid on Titan is not water but methane and the scientists expect life there to be methane-based.

Darwinian spacecraft engine to last twice as long

The following article from New Scientist is a prime example of what can happen when we don't fight progress for fear of losing our superstitions. Through our acceptance of Evolution and Natural Selection we are able to use its principles to better our own technologies.

SPACE agencies may one day have Charles Darwin to thank for the longevity of their spacecraft. The life expectancy of a popular type of ion engine has been almost doubled using software that mimics the way natural selection evolves ever fitter designs.

Electrostatic ion engines are becoming popular in space missions. Instead of relying on burning large amounts of heavy liquid propellant for thrust, they use solar power to ionise a small supply of xenon gas. A high voltage applied across a pair of gridded electrodes sends the positively charged ions rushing at high speed towards the negative electrode. Most ions pass through the grid, generating thrust.

However, some ions collide with the grid itself, causing it to gradually wear out, says Cody Farnell, a space flight engineer at the University of Colorado in Fort Collins. Simulations suggest grids in a typical NASA engine will last 2.8 years - but Farnell wondered whether changing the grid's design could extend its lifespan.

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