From the brains behind brains on, this is the moment of

arm.

Moment of um.

Moment of um comes to you from APM Studios. I'm Hortensia Hippopotamus.

Oh, what a perfect day for some pool time.

As a hippopotamus living at the zoo, I've got a gorgeous habitat,

complete with lovely grassy hills, a few tree trunks for

backscratches, and a big glorious pool. You may think I'm quite the hippopampered hippopotamus, but I work for a living.

You think it's easy being a huge gorgeous creature like me?

I'm on my feet for at least an hour every day strutting my

stuff for the fans that come to visit me and these tutsis of mine support all 3,000 pounds of me.

That's like the weight of a car.

So when it's time for this hippoh Hotamus to cool down and relax,

I slip into my pool and the water lifts all my cares away

But also my body literally feels lighter when I'm doing my splishy splashy self-care.

Why is that?

My human friend Rebecca wanted to know too.

Why do things seem lighter in the pool?

Hi, hello, my name is Chia Chen. I am an associate professor here at Cal Tech in the physics department.

And the answer to that is, well, water is helping you.

Water is doing the job of holding things up.

So imagine you have a rubber duck in your hand and if you're

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