text: Since 2013, Dr Milton Wainwright has been trying to convince the scientific community that he has found aliens in Earth's stratosphere. Now the controversial British professor claims he has new evidence of these 'extra-terrestrial organisms' floating 25 miles (40km) above the planet. He says the organisms test positive for DNA, and have masses that are 'six times bigger than the size limit of a particle which can be elevated from Earth to this height.' Dr Milton Wainwright has been trying to convince academics that he has found aliens in Earth's stratosphere for several years. Pictured are one of the so-called 'ghost particles' that the researcher claims to be proof of extraterrestrial life forms. His views have been widely dismissed by the scientific community . The organisms, he claims, are contained in a microscopic metal globe designed by an intelligent species to 'seed' alien life on Earth. Dr Wainwright announced the discovery in an email to his students at Sheffield University, who posted it on Reddit. 'We sent balloons and a sampler and found no pollen or grass, nothing up there to contaminate, it was completely pristine,' Dr Wainwright told Jason Koebler at Motherboard. 'For these reasons, we think [the organisms] are coming from space,' he added. 'All the time when you walk outside, you are being pelted with organisms that come from space.' He said that his latest discoveries has been accepted in the journal Astrobiology and Outreach. Dr Milton Wainwright (right) claims he has new evidence of these 'extra-terrestrial organisms' floating 25 miles (40km) above the planet. He says the organisms test positive for DNA, and have masses that are 'six times bigger than the size limit of a particle which can be elevated from Earth to this height' Dr Wainwright's research has been widely criticised by the scientific community as being backed by poor and flimsy evidence. 'The critics claim that the samples we obtained must have come from Earth, that it that there must be a mechanism which can lift these particles from Earth to the stratosphere,' Dr Wainwright told Dailymail.com. Panspermia is a theory that suggests life spreads across the known physical universe, hitchhiking on comets or meteorites. For example, life such as extremophiles, capable of surviving the inhospitable conditions of space, could become trapped in debris that is ejected into space after collisions between asteroids and planets that harbour life. These life-forms may travel dormant for an extended amount of time before colliding randomly with other planets. The idea of directed panspermia, however, suggests that lifeforms are deliberately sent out through the universe by intelligent civilizations . Professor Francis Crick, one of the biologists who discovered the structure of DNA, examined the possibility of this in a paper in 1973. However, Professor Crick and his ccolleagues concluded that the scientific evidence was 'inadequate at the present time to say anything about the probability'. 'However, we have provided evidence that the DNA-containing masses, plus other strange organisms we have isolated are not associated with pollen, grass and fungal spores on our sampler. 'If our organisms came from Earth they must be contaminated with common Earth organisms and they are not.' 'We will probably not be believed until Nasa repeats our findings,' he added. 'I suspect that Nasa they will then try and take the credit by claiming that their methods were somehow more sterile or precise.' Earlier this year, the astrobiologist revealed an image of what he said was a tiny metal ball spewing out a 'gooey' substance in samples gathered by a balloon in the Earth's stratosphere. Dr Wainwright said the ball, which is about the width of a human hair, could be an example of directed panspermia. This describes the belief that life was deliberately sent to Earth by some unknown extraterrestrial civilisation. He argued that the strange material coming from the titanium ball is biological and could in fact be a colony of tiny microorganisms. However, he conceded it is virtually impossible to prove that the tiny sphere was sent by aliens from outer space. Dr Wainwright said the sphere made a tiny 'impact crater' on the sampler that was attached to the balloon as it collected dust and particles in the atmosphere. He added: 'The sphere made an impact crater on the sampling stub. This proves beyond doubt that the particle was travelling at speed from space when it was sampled.' Dr Wainwright and his team discovered the sphere when examining samples of dust and particulate matter collected by a balloon sent around 16 miles into the atmosphere. The metal sphere found by Dr Wainwright and his colleagues (above) appears to be oozing goo from its side . Using X-ray analysis to examine the sphere, he concluded that it was made from titanium and traces of vanadium, while the material appearing to come out of the side was biological. They found that it also had a 'fungus-like knitted mat-like covering'. Dr Wainwright and his colleagues have published their findings in the Journal of Cosmology but their conclusions have yet to be corroborated by other scientists. The journal often publishes papers on astrobiology but is highly controversial among scientists as it has been criticised for its peer review process and for publishing papers of a fringe variety. Two years ago it controversially published a paper that claimed to have identified fossils of microbiotic life in a meteorite, sparking a blaze of publicity, but was also met with a great deal of skepticism. The idea that life can survive high the Earth's atmosphere, however, is not new. Scientists working with Nasa recently discovered bacteria living up to five miles above the Earth's surface. However, most scientists believe they are likely to have been carried up from Earth rather than having an extraterrestrial origin. Air currents and winds are known to be capable of carrying dust and bacteria for hundreds of miles and high into the atmosphere. But research has shown that microorganisms can survive the intense heat and pressures of entering the Earth's atmosphere from space, raising the prospect that life may have originally been carried here. Some astrobiologists believe life started on Earth after being carried here on a comet or asteroid, while others believe it is more likely that the basic chemical building blocks were carried in this way rather than established life. However, the idea of directed panspermia has been proposed by some heavyweight scientists. Professor Francis Crick, one of the team who one a Nobel Prize for discovering the structure of DNA, examined whether it was possible that organisms could have been deliberately transmitted to the Earth by intelligent beings from another planet. Dr Wainwright used balloons similar to this one above to collect samples from the stratsophere . He eventually concluded that there was insufficient scientific evidence to support such a claim. Dr Wainwright, however, insists his findings may help to provide some of that evidence. 'Unless of course we can find details of the civilisation that is supposed to have sent it in this respect it is probably an unprovable theory,' he added. Professor Chandra Wickramasinghe, an astrobiologist at the University of Buckinghamshire and editor of the Journal of Cosmology, said: 'I think more work needs to be done on this particular structure, for example to study its DNA, if it has any. 'But already there is clear proof from many directions to confirm that we are constantly bombarded by fragments of comets that carry living microorganisms.' Nigel Watson, author of the UFO Investigations Manual, said the idea that such material were being sent out by aliens attempting to seed other planets was a 'leap of the imagination'. He said: 'This would seem to provide proof that outer space and not just the surface of our planet is teaming with life. 'I'm sceptical about this and we would need to collect more samples like this to have a better idea of where it originates from. 'It is a leap of the imagination that it came from an ET race trying to seed our planet with their biological constructs. 'Perhaps there are luminous or 'invisible' jelly-fish like creatures that inhabit our skies, or microorganisms flooding our planet, I'm not convinced, but they are fascinating ideas that make a change from stories of starships loaded with aliens.'
target: Radical claim made by Dr Milton Wainwright from Sheffield University .
  He used balloons to collect dust samples 25 miles (40km) above Earth .
  Claims to have discovered 'alien organisms' that test positive for DNA .
  His research has been widely criticised by the scientific community .