|Gale Crater on Mars image credit:|
NASA / JPL-Caltech / University of Arizona (slightly modified with Clker clipart)
Wait, maybe there's life under Mars, yeah, that's it! Would a meteorite impact give the robotic denizens something to examine? Nope. It would have obliterated all traces of organic material. Seriously, that's been proposed. Hey, I'll go you one better: the Ice Warriors of Mars are not native life forms, they are immigrants from another planet and have burrowed way, way down where humans will never find them. So there.
God made Earth special, and put it in a special place. Secularists don't want to give the Creator his due, so they seek evidence of nonexistent evolution elsewhere in the solar system. It's not surprising that their efforts continually fail, and predictions about deep time, extraterrestrial life, and other things continually fail.
If you want to know the bad science that got me going into snark mode, and other stories about the pseudoscience of astrobiology, click on "Mars Life Hopes Reduced".