In this lucrative Question of the Week we find out how paper notes and metal coins are minted and printed in the money making factories of the UK. Plus, we ask if and how subliminal CDs work... Like this podcast? Please help us by <a href="https://www.thenakedscientists.com/donate">supporting the Naked Scientists</a>

Do subliminal learning CDs work?

Each week we set out to solve one of the world's weirdest, wackiest, funniest and funkiest scientific puzzles. And along with the answer there's a brand new question to think about for next time...