Riddle #700

Question: An archaeologist is searching some caves and discovers two frozen people that have somehow remained completely intact. He immediately recognizes them and knows that they are Adam and Eve, the first two people.

How did he know this?

Question: What tastes better than it smells?

Question: What goes in the water black and comes out red?

Question: What loses its head in the morning and gets it back at night?

Question: What two things can you never eat for breakfast?

Question: People see through me, but none pass through without killing me. I can be anywhere, and can be seen double or single. What am I?