More ideas from Arcana
Biology: Human - Heterochromia (picture only)

Heterochromia - A beautiful mutation that causes the iris to have more than one color, or a person can have two different colored eyes - example: one brown eye and one blue eye. [And here I thought hazel eyes were just always multi-coloured]

Finding Another Earth

This artist’s conception of a planetary lineup shows habitable-zone planets with similarities to Earth