Now might be a good time to spend a little time with everyone’s favorite physicist, Neil deGrasse Tyson, as he revisits the origins of the atoms that make up the human body.
… most humans on Earth, especially if they descend from Europe and most of Asia, carry about 1 to 4 percent Neanderthal DNA in their cells. Proportions will vary. British comedian Eddie Izzard, discovered he’s 2.8 percent Neanderthal. You don’t carry Neanderthal DNA unless someone up your family tree coupled with one.
So that’s our proof: that our first encounter with an intelligent alien led to … umm, well … more.