

Dr Becky (aka Dr Rebecca Smethurst) for Astrophysics / Space news.
Any of the channels run by Brady Haran like Numberphile and Periodic Videos.
Most of my other picks have been mentioned already or else lean into spectacle which might not be appreciated by a 12-year-old girl. (Quite a few of the chemistry channels I watch are like this. In order of decreasing silliness: Nile Blue / Nile Red, Labcoatz, Amateur Chemistry, Chemical Force… Actually CF is pretty good by comparison.)
But I’m not you or your daughter. Check them out anyway and see if either of you likes what you see.






It’s actually an infinitesimal chance per subatomic particle, so if it does happen it’s actually more likely you’ll only be partway through the wall before your luck runs out.
And if that weren’t existential dread enough, the same applies to walking on floors.
Floating in space seems safe right about now.
… except that quantum tunnelling can happen without anything in the way. Any one or more of the particles that make up a person can spontaneously resolve its wave function elsewhere in the universe.
But the odds of any of this happening, especially in a massive object with interlinked wave functions, are so close to zero they might as well be.