The world is changing faster than ever. Now, with The Economist Insider, a new premium video offering,

we're giving you unprecedented access to the debates shaping our world. I have set around that

table at NATO. There is an incoming missile attack now. Could you answer the question? I'm sorry,

we've got way little time left. With a few surprises along the way. I can't promise we'll have a cocktail

every time, but we'll try.

So, don't just be an Economist reader. Get on the inside track with The Economist Insider.

Go to Economist.com to join the conversation.

Support for this show comes from Macy's. Layering is an art form. All it takes is a bit of intention, style, and of course, the perfect cold weather staples.

So find the perfect look for you with the help of Macy's fall fashion guide,

your one-stop shop for fall's latest trends and must-haves, curated by their experts.

From leather to denim to cozy knits, find everything you need to piece together your new fall look.

Explore the Macy's Fall Guide for yourself and shop in store or online at Macy's.com.

When snails, sometimes they'll take no note of each other whatsoever. They'll just either, you know,

slide on by each other. But they, they will,

it almost looks like they're kissing each other. They'll just touch each other with their,

with their, with their eyes stalks. And they just kind of have a general, you know, just a touch of

each other. When a snail mates, it's called traumatic insemination.

They stab each other with a spear about the size of a fingernail.

It's sometimes called a love dart.

If you scale it to the human body, it would be like a 15-inch knife

that contains a fertility-boasting hormone.

Snails are hermaphrodites, so any snail can mate with any other snail.

...