Question: Is it possible for people to ever walk through walls?

Daniel Scully answered on 23 Nov 2011:

Well, Quantum Mechanics says that if you leant against a wall for a long time (like billions and billions and billions of years) there’s a small probability that you could fall through the wall!

It’s very very very unlikely to happen and you’re much more likely to fall half way through (though that too is very unlikely itself).

As to whether we can make a device that allows people to walk through walls, I don’t think that will ever be possible. Sorry!