Humans have always been fascinated with aliens and have been searching for them ever since they set foot on the moon. Scientists and alien fanatics have been looking for extraterrestrials far in the stars and galaxies. But now, people are speculating that aliens may have encoded the human DNA!

Experts, in a report on Ancient-Origins, say if extraterrestrials have left behind some hidden but decipherable proof of their existence, to test our intelligence and level of scientific advancement, they might have left it inside the cells of our body, that is, in our DNA. This may sound like a science-fiction script, but it may be true. Researchers also believe the data holding the truth about our origins and our connection to alien life can be found by “searching within”.

Robert Zubrin, an astronautical engineer and space advocate, said the possibility of human DNA making an interstellar journey cannot be ruled out. Zubrin said they would have been subject to high doses of both cosmic ray and ultraviolet radiation that would have limited its survivability. He said that out of the initial billions of bacterium cells sent, at least some would survive and get through - thus, preserving the message in the process.

Physicists Vladimir Sherbak and astrobiologist Maxim Makulov, from Kazakhstan, believe humans have been genetically engineered by “beings” from another star system. They are of the opinion that the so-called beings may have visited Earth hundreds of millions of years ago, or they may have sent an information-packed signal into space that landed on Earth and triggered alterations in the human DNA.

“Once fixed, the code in our DNA might stay unchanged over cosmological timescales,” the two scientists wrote in Icarus. “Therefore it represents an exceptionally reliable storage for an intelligent signature.”

Looking deeply at the human DNA, Sherbak and Makulov say it seems as if it has been created with mathematical precision. “Simple arrangements of the code reveal an ensemble of arithmetical and ideographical patterns of symbolic language. It includes the use of decimal notation and logical transformations that are accurate and systematic,” they explained.

Zubrin hopes there is some sort of information in our DNA. He said there might be an “alien code” of amino acids just waiting to be unscrambled and decoded by humans.

A DNA double helix is seen in an undated artist's illustration released by the National Human Genome Research Institute, May 15, 2012. REUTERS/National Human Genome Research Institute/Handout