Hi, we're here from Curiosity.com to help you get smarter in just a few minutes.

I'm Cody Gough.

And I'm Ashley Hamer.

Today you learn about why it's good news that muscle memory is real, why a penguins wattle has some advantages over the way we humans walk, and research

that shows how individuals can have a bigger impact on slowing climate change than we thought.

Let's satisfy some curiosity.

Whether you were a star athlete in high school

or you got on a fitness kick just a few years ago,

it's never fun to fall out of shape.

I mean, getting your body back where it used to be

can feel impossible when you're starting from square one.

Fortunately for you, I have some good news.

According to recent research, you may not be starting from square one after all.

It turns out that your muscles remember when they were stronger

and they store that memory in their DNA. That's right, muscle memory is real.

When people talk about muscle memory, they usually mean procedural memory.

The brain-based memories that make it seem like your hands can just remember how to tie your

shoe or shuffle cards without you having to consciously think about it.

This is not that.

Instead, this memory is a record of the muscle's earlier growth,

and it's actually stored in the DNA of your muscle cells.

This happens thanks to something called epigenetics, which deals with the way

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