Elongated Skulls Could be Proof of Alien Life Here!

If they could type the blood, there must have been some DNA. If so, why not generate a living being from it, and we would answer some of these questions. I know, alot of people think it's wrong to clone someone. They aren't space aliens. They may be a sub species that died out for many reasons. Also, ever notice in all these supposed alien cultures, that nothing is ever found but stone structures. No metals, no synthetic materials, etc.