A new study presented to the Royal Society meeting on ancient DNA in London last week has revealed a dramatic finding – the genome of one of our ancient ancestors, the Denisovans, contains a segment of DNA that seems to have come from another species that is currently unknown to science.
The discovery suggests that there was rampant interbreeding between ancient human species in Europe and Asia more than 30,000 years ago.
No one has answer unless you were the first upon planet, according to bible would be Adam, if he were alive how old would he be? So if we extrapilate he existed, then we might suggest alien origin as we have no clue as to origin.
If we look at DNA and science we come to agreement we are older than appears substantatively, as a species but science permits question of our origin only to determine focus not biblical skeptism against faith but might affirm if we learn to use scientific principles with theology in full context or we are just from experiments gone wrong.
Soon, their descendents started to grew in numbers and they started to expand.