Here is something on the lighter side

[Mr Rob]

The term “exo” throughout many different branches of science has come to mean the speculative exploration of what forms science may take “outside” of the boundaries of earth. There are exo-biologists, exo-archaeologists and even ex-musicology (I kid you not). Some of these speculative theories are pretty interesting, especially when exploring what forms life on distant planets could possibly take – a bacteria, a colony of mutant ants, or humans just like us?

http://www.makeuseof.com/tag/create-explore-alien-planets-exoexplorer/