For those of us who wonder if earthlings are the only intelligent species in the Milky Way and beyond, try this theory on for size:
Two scientists in Kazakhstan believe humans may have an extraterrestrial "stamp" embedded into our genetic code, a mathematical message that would not be explained by Darwin's theory of biological evolution.
The scientists are suggesting that an advanced alien civilization "seeded" our galaxy eons ago with an ET signal that eventually found its way to Earth, implanting a genetic code into humans, reports Discovery.com.
Physicist Vladimir I. shCherbak of al-Farabi Kazakh National University of Kazakhstan and astrobiologist Maxim A. Makukov of the Fesenkvo Astrophysical Institute refer to this far-out concept as "biological SETI."
To read more, click here.