It’s been 52 years since humans last stepped onto the moon, and NASA is determined to set up a permanent base there. But there are huge challenges to overcome - not least surviving brain-damaging solar radiation and bone-wasting partial gravity.   Today on Why?, Luke Turner speaks to Clive Neal, Professor of Planetary Geology at Notre Dame University currently working with NASA on their next moon mission and find out exactly how they plan to build a long-lasting habitat.     • “What we’ve learned during and since Apollo, is that the moon is a very hostile environment, but now we understand the nature of that hostility. And that understanding is key to being able to keep humans alive on the surface of the moon – not only to survive, but to thrive.” - Clive Neal  • “Radiation and humans don’t miss in the long term. Radiation is much more intense in the lunar environment. So a human habitat on the moon would have to be buried beneath about two meters of regolith to protect them.” - Clive Neal    Written and presented by Luke Turner. Produced by Anne-Marie Luff and Eliza Davis Beard. Audio production by Jade Bailey. Managing editor: Jacob Jarvis. Group Editor: Andrew Harrison. Artwork by James Parrett. Music by DJ Food. WHY? is a Podmasters Production.  Learn more about your ad choices. Visit podcastchoices.com/adchoices