NASA: More evidence suggesting alien life

- Scientists have found DNA components in meteorites from the 60s the twentieth century. But there was no certainty whether they were created in the cosmos, or whether they are ' dirty 'arising from the presence of a meteorite on the surface of the Earth, explains Dr. Michael Callahan of NASA's Goddard Space Flight Center in Greenbelt, Md.., principal author of the paper describing the discovery. 

Callahan research group presented three documents proving the hypothesis of cosmic origin of the meteorite fragments of DNA. This is not the first such research by scientists from NASA. Previously, for example, amino acids found in samples from the comet Wild 2 in the Stardust mission, and various carbon-rich meteorites. Amino acids are essential proteins - the fundamental components of life. In a recent study examines in detail the twelve carbon-rich meteorites, of which nine were found in Antarctica. Found in these adenine and guanine, which are the building blocks of DNA. Also been detected in meteorites hypoxanthine and xanthine , which are not components of DNA, but are involved in.