This little nocturnal big-eyed monkeylike creature could easily be mistaken for an alien if you cut its tail off.
http://www.youtube.com/watch?v=oU3-TioCdDk
DNA testing is being done but is not yet to the point of proving it is ONLY human. The bias to believe it cannot be an alien life form causes DNA scientists to stop as soon as they see some human sequencing, but the testing is being done to a degree which will map the entire coding. ‘We shall see what we shall see, when we see what we see’ as the old Russian said.