Why do we have two eyes?
96993
Why do we have two of some organs, but not all?
83300
Why don't mammals have more than 4 limbs?
106057
What do first, second, and third person perspective mean? Why are they so called?
87357
Why does Harry Potter wear glasses?
118736
Why do the Human-looking Youkai obscure their eyes?
17126
Significance of the second focus in elliptical orbits
42336
The Line with two origins
142653
Perception of Depths and Stereovision
93714
Why do we not have spin greater than 2?
78956
cat eye vs. cat's eye
139987
Special Relativity, 2nd Postulate -- Why?
91972
Why Faces eat each other?
156216
Why do nearsighted people see better with their glasses *rotated*?
119081
Why do we differentiate?
50545
Why are humans so variable in appearance
56410
Why Do we close our eyes while sneezing?
145887
two's complement