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Ouch, Ouch, Ouch, Ouch, Ouch, Hey, smarty pants. Today's show is about something I'm willing to bet

you take for granted. Meat!

Okay, man, not meat. Meat tank! Definitely not meat tank. Meat!

No, I already said it wasn't meat. No, me have meat right here.

Ah, I can see and smell it, but...

Ah, where is meat? Meat here, Marge.

Good. Cook meat with fire. What took you so long?

Feet hurt. Pain from shoes. Must walk slow. Ouch.

Ah, here we are at a big moment in history.

Huh? Do your feet hurt too? Uh, no, my feet are fine.

I have idea. Um, stuff shoes with grass. Grass?

Yes. Soft grass make feet feel better. Use leaves too.

Now put shoes back on.

Ooh, much better. But now feet itchy.

Poison ivy. Doll. Smarty pants. Historians believe that early humans, like

Ugen Marge here, helped change footwear forever. When stone age people used grass to make shoes

more comfortable and less sweaty, they created something that does the same thing as a piece of

...