There are some things that are just not possible on our planet. It would certainly be understandable that if you think that if it is impossible here on Earth, then it would be impossible everywhere else in the universe. But that's simply not the case. The universe is far stranger than any of us can actually believe. This video by RealLifeLore is a collection of five impossible things that can happen on other planets.
Top image: Methane sea on Titan (Saturn's moon). Credit: NASA/JPL/Univ. Arizona/Univ. Idaho.