Inspirational ANON
Actually I read an interesting article about organisms on other planets (small, not aliens). Scientists have been studying them and have discovered that evolution might just be unique to our own planet.
Humans are the only organism we are currently aware of that have existed on another celestial body.
Any theoretical organism that uses a system of
1. heritable
2. mutative
chemical encoding - that is, genes - will be subjected and responsive to selective pressures.