Animals with blue eyes are a rare occurrence in nature due to being linked to recessive genetics, mutations, and specific ...

At the same time, the man possessed the genetic variations that produce blue eyes in current Europeans. That combination makes for a rare genetic profile, but perhaps it was more typical of the ...

Blue-eyed cicadas are fairly uncommon, differing from the usual reddish-tan eyes of periodical cicadas that swarm swaths of the United States. It isn’t clear how rare the blue-eyed bugs are ...