It's to do with your genes. I have heterochromia, I finally found out a couple of years ago that it's to do with the genes you carry - both my parents have blue eyes and i have one blue and one...
Did you know that bats can't see in the day because they are nocturnal so they eat at night Actually, there are some bats that can see in "daytime", more light twilight, but hey sun's rays are still...