A Nasa scientist believes he has found out an alien life form which may clarify how life on earth started and has called on any scientist worldwide to try and prove him wrong. The extraordinary claim by Dr Richard Hoover, an astrobiologist with Nasa’s Marshall Space Flight Center, comes after 10 years of studying tiny bacteria in meteorites that have fallen in remote areas across the globe. He gives details that travelling to Antarctica, Siberia and Alaska he has learnt an notably rare type of meteorites – CI1 carbonaceous chondrites – of which only 9 are known to exist on earth. Looking at these meteorites under microscopes he mentioned he has found lots different fossils of bacteria – a few of which are just like ones on earth and others which are complete, um, alien. He suggests that meteors spread organisms around the universe and that life on earth could have been planted by bacteria in an asteroid hitting the planet in its infancy. In one case he discovered on a meteorite an organism similar in size and overall structure to the giant bacterium Titanospirillum velox, an organism found out here on planet Earth.