MOSCOW, May 26. /TASS/. Russia's space corporation Roscosmos says it is studying dust samples collected on the outer surface of the International Space Station (ISS) for the presence of any traces that might point to the existence of extra-terrestrial life forms.

"The micrometeorites and comet dust that settle on the ISS surface may contain biogenic substance of extra-terrestrial origin in its natural form. The ISS surface is possibly a unique and easily available collector and keeper of comet substance and, possibly, of biomaterial of extra-terrestrial origin," Roscosmos says.