When it comes to facts about the natural world, there seem to be no shortage that really freak people out. These 17 scientific facts definitely fit the bill, so fair warning before you scroll through this list – some things you can just never un-know. Therefore, when an anglerfish meets another anglerfish, it’s incredibly important they get the chance to mate over and over again. This fools your brain into thinking it sees the new view even before your eyes moved to where you could see it. What’s a scientific fact that makes you feel like you’ve got bugs crawling over your skin?