It seems to be a frequent mistake. If it weren't a frivolous use of time travel, I'd be tempted to go insert a genome for green skin back when they were still swinging in the trees. Our outward appearance might look the same, but internally, my race is nothing like the Terrans...the race of Men.

[Now that that small rant is out of his system...]

Yes, I've died once so far. Died and regenerated. Well, technically, I was just nearly dead. It's a characteristic of my species, when injured beyond healing or close to death, we regenerate, change every part of our bodies and become a new person, but still holding all the memories of the old. One more way in which we are not like humans.