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Today on something you should know, why is it called plastic surgery? Where does the plastic come in? Then, is evil a real thing? Can people truly be evil? Or is evil something else?

I don't think evil is a helpful concept. I argue that empathy is actually a more useful concept than evil to understand both cruelty and kindness.

Then, fireflies are disappearing all over the world. I'll explain why. And the amazing story of the bicycle. It's had a significant impact all over the planet.

The bicycle is the most widely used vehicle on earth. The roughest thing is that there are 2 billion bicycles. There are 1 billion cars. So in many ways, even though our cities and our landscapes are dominated by infrastructure for cars, it is a bicycle planet that we live on.

All this today on something you should know.

If you've been listening to something you should know for a while now, you pretty much know what to expect. Fascinating and useful information presented in an interesting format.

So you might be interested in knowing about another podcast called Constant Wonder. It's a podcast that does something similar to this one, but in a different way.

That I know you're going to like. Each week, Marcus Smith, he is the host of Constant Wonder. He and his guests explore a single topic from science, history, or art.

And within minutes, maybe seconds, you'll be caught up in the discussion. They talk about things like how a desert can be reforisted without planting a single tree.

Or the unfinished story of America's National Anthem, or the humble farmer who walked across six continents and met the world's most elite people.

Constant Wonder will leave you feeling rejuvenated. You get the impression that the world might actually be a place where wonderful things happen and people can accomplish the extraordinary.

Look, no one knows better than me how hard it is to find a good podcast that you like that holds your interest and that you'll stick with. Constant Wonder does all that.

Check out Constant Wonder, wherever you get your podcasts. And I've put a link to Constant Wonder in the show notes for this episode.

Something you should know, fascinating intel, the world's top experts, and practical advice you can use in your life today. Something you should know with my carothers.

And in just a moment, we're going to tackle a topic, a big topic that is in the news and something I'm sure everyone is thought about and that is the topic of evil.

Welcome to something you should know we're going to start today with something I've always wondered about. Why is it called plastic surgery?

Because most of the time I don't think there's a whole lot of plastic involved. So why is it called plastic surgery?

According to medical historian Lindsey Fitzheres, who wrote a book called The Face Maker, the term plastic surgery was first used in 1798 by a French surgeon. And at that time, the word plastic didn't mean what it does today, a synthetic substance that you make credit cards out of.

Plastic simply meant something you could mold like skin or soft tissue today under the umbrella of plastic surgery is reconstructive surgery, which is the attempt to put something back the way it was and cosmetic surgery, which is more about trying to improve over the way it was.

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