All Episodes

December 23, 2021 25 mins

Tonight's the night the magic happens. Old St Nick sets off from the North Pole and delivers presents to children all around the world. How does he do it?

On December 24, every year, Santa Claus piles his sleigh up with presents, he hitches Rudolph and his other reindeer up and heads off to deliver those gifts to every child in the world.

How?

JJ Eldridge, Associate Professor in Physics at the Faculty of Science, University of Auckland said if she was Santa, she would start with cloaking technology, which would explain why no one ever sees Santa dropping off the presents, and there is already a bit of this tech in development.

The ability to cover the whole world in one night gets trickier, but JJ said it is not outside the realms of possibility.

"One of the most difficult things about physics is you have to kind of throw out everything you understand from your own eyes and ears about how the world works," she said, "Because when we go down to the very small level, the quantum mechanics level, things get a bit strange."

Go to this episode on rnz.co.nz for more details

Mark as Played

Advertise With Us

Popular Podcasts

On Purpose with Jay Shetty

On Purpose with Jay Shetty

I’m Jay Shetty host of On Purpose the worlds #1 Mental Health podcast and I’m so grateful you found us. I started this podcast 5 years ago to invite you into conversations and workshops that are designed to help make you happier, healthier and more healed. I believe that when you (yes you) feel seen, heard and understood you’re able to deal with relationship struggles, work challenges and life’s ups and downs with more ease and grace. I interview experts, celebrities, thought leaders and athletes so that we can grow our mindset, build better habits and uncover a side of them we’ve never seen before. New episodes every Monday and Friday. Your support means the world to me and I don’t take it for granted — click the follow button and leave a review to help us spread the love with On Purpose. I can’t wait for you to listen to your first or 500th episode!

Stuff You Should Know

Stuff You Should Know

If you've ever wanted to know about champagne, satanism, the Stonewall Uprising, chaos theory, LSD, El Nino, true crime and Rosa Parks, then look no further. Josh and Chuck have you covered.

Dateline NBC

Dateline NBC

Current and classic episodes, featuring compelling true-crime mysteries, powerful documentaries and in-depth investigations. Follow now to get the latest episodes of Dateline NBC completely free, or subscribe to Dateline Premium for ad-free listening and exclusive bonus content: DatelinePremium.com

Music, radio and podcasts, all free. Listen online or download the iHeart App.

Connect

© 2025 iHeartMedia, Inc.