At this rate, unless our microbes mutate into something like “The Flood” in Halo wars, there might be no Martian Beasts for a long long time.
Martian Natives?
Time Traveller
11
Haven’t you learned anything in all your years of reading Sci-fi? Just because we can’t see them doesn’t mean they aren’t there. They could also just be hiding so they could lure us and eat. In fact, I think it is a long con.