Exobiology is considered a hard science though the subject is highly speculative.
“Also see: Exotic life Despite its diversity, all life on Earth displays a remarkable similarity...Alternative biochemistry
“On Earth it is believed that life originated or could have originated in caves or round...How Life could Evolve in a Red Dwarf Star System
This category has the following 4 subcategories, out of 4 total.
Pages in category "Exobiology"
The following 24 pages are in this category, out of 24 total.