Unusual skeletal remains with just three fingers and toes have been hinted at being aliens.
The remains, found in Peru along with a nine-month-old baby, have been named Maria by a research team who reveal that their find is humanoid - having 23 chromosomes - but they suggest there are unhuman things about the remains.
Professor Konstantin Korotkov, from the Russian National Research University, told Sputnik News: "Each of the little mummies has two arms, two legs, a head, a pair of eyes and a mouth.
"Tomographic scans reveal their skeletons.
"The tissue has biological nature and their chemical composition indicates that they are humans.
"Their DNA features 23 pairs of chromosomes, just like we have. All the four of them are males, each with a Y-chromosome.
"They appear human but they are not. Their anatomic structure is different. They could be extra-terrestrials or bio robots.
"Maria and [baby] Vavita could have been representatives of a certain race which had possibly reached a stage of advancement much earlier than we did.
"Maybe thousands of years earlier."