Emily, thank you so much. I'm off to go and learn how to use AI just in case. Thanks for having me. And I should remind listeners that we've been answering your questions about artificial intelligence on the show. So if there's anything you want to know about AI, please do write in to podcast.economist and someone better qualified than I am will try to answer your question. And later this week, Babbage, our science podcast asks a really big question. What is artificial general intelligence? You'll need to be a subscriber to listen to that. Search Economist Podcast Plus if you aren't one yet.

The ancients knew about Mars.

Sumerians,

Egyptians, Babylonians, the Greeks called the nearer planets wanderers. But it took until the age of the telescope to identify Mars as a planet. Thanks, Galileo. Since then, plenty have dared dream about what it would be like to live there, not least science fiction authors and filmmakers.

Okay, we're ready to light this candle. Let's go to Mars. Films

from Mission to Mars to John Carter to The Martian.

I am the greatest botanist on this planet.

To a personal favorite, Total Recall. You

were interested in a memory of... Mars.