UniversalWolf
eaten by a grue.
PS, one thing they never explained is why the Russians needed the alien remains from Area 51, all they seemed to need was the skull the Conquistadors had taken with them.
Cate's character says something about that at one point, but it's really easy to miss. Apparently the Russians found two dead aliens themselves, but they didn't have crystal skeletons. Then they also found a third that did have a crystal skeleton. They needed the Area 51 remains for comparison or something.
It's all very nebulous, but there was a stab at a brief explanation.
Also, I agree with your review.