Worst epic science fail you have seen in sci-fi?

[stevebowers]

I was a bit disappointed in Interstellar, too. The wormholes and black holes looked good, and were scientifically accurate (the wormhole looked a bit like an old simulation Anders made, way back in 2000). But then they go to a planet with frozen clouds.
What?

I've made up some wacky planets in my day, but frozen clouds is beyond the pale.