An atheist believes in no supernatural entity but then, projects even further, saying it's IMPOSSIBLE for any such entity to exist. Because there's never been absolute proof for the existence of a supernatural entity acting as God, they project that lack into ... it CAN'T be possible.
And so they'll ignore or discredit -or try to- ANY kind of paranormal occurrence.
That doesn't fit with real science because science always attempts to find answers to puzzles.
On the other hand, the hard line religionists attempt to ignore or discredit all evidence of evolution ... because it doesn't fit with their belief in absolute creationism.