I am not normally a nit pick (well, maybe I am) but this jumped out at me: an example of a fact--"whether Earthly life arose by natural selection." Because natural seletion is one of the cornerstones of modern biology, I thought I'd take a few seconds to enter this comment.
Natural selection is a biological process by which favorable traits that can be gentically inherited become more common in successive generations of a population of reproducing organisms, and unfavorable traits that can be inherited become less common. The driving force is the need to survive. So, for example, cheetahs that can run faster because of inheritable traits catch more food and tend... (read more)
I am not normally a nit pick (well, maybe I am) but this jumped out at me: an example of a fact--"whether Earthly life arose by natural selection." Because natural seletion is one of the cornerstones of modern biology, I thought I'd take a few seconds to enter this comment.
Natural selection is a biological process by which favorable traits that can be gentically inherited become more common in successive generations of a population of reproducing organisms, and unfavorable traits that can be inherited become less common. The driving force is the need to survive. So, for example, cheetahs that can run faster because of inheritable traits catch more food and tend... (read more)