Do you also feel like your newer sweaters just keep falling apart?

You know nowadays if you go to the market, if you see something very cheap, you see the peeling like right after like after a few days like you're

gonna see that you witness that. It's Wednesday November 22nd but every day is

Science Friday. I'm Scifry producer and sweater enthusiast Rasha Iridi.

For years, years I've been searching for the perfect white chunky knit sweater, very when

hairy met Sally inspired. But all I have to show for it is a pile of raggedy fraying sweaters. If you like me are also desperate for an

answer, we are going to unravel the science behind sweaters. But first, guest host Flora Lichtman talks with a cosmo chemist about getting closer to discovering the moon's real age.

It's hard to imagine, but the moon that we know and love hasn't always been in the sky. Like all of us, it has an age, and that age has for a

while been estimated to be about 4 billion years old. But recent research on lunar crystals

from the Apollo 17 mission has helped us pinpoint a more specific age for the moon,

and it turns out it's about 40 million years older than we thought.

Okay, I know that might sound like a drop in the

bucket when you're 4 billion years old but my next guest says it's actually a

really big deal because it tells us about what the solar system was like when it was just a baby.

Joining me now to talk about this is the study's lead author, Dr.

Jennifer Greer, postdoctoral researcher at the University of Glasgow in Scotland.

Welcome to Science Friday.

Hi, thanks for having me.

Okay, let's start with this.

Why is it exciting that the moon is 40 million years

older than we thought?

Or is it exciting? Yeah, I think it's at least important because

...