10.9, 8, 7, 6, 5, 4, 3, 2, 1.

I'm Bethany Van Delft, and this is the 10 News,

where we get the lowdown on what's up in the world.

It's Thursday, August 5th.

The Olympic Games are in their last week,

and the schedule is full with surfing, sailing, diving, and a bunch of other water sports.

So today, we're getting wet and exploring what lies beneath the surface.

Let's dive in.

Water is weird and wonderful.

So let's kick off our watery adventure with a sprinkle of facts.

Check out these five fascinating facts about our watery world.

Number one, 71% of Earth is covered in water.

Seems like there should be a cool sip at your fingertips anytime you're thirsty, right?

The thing is, only 3% of that number is freshwater.

The rest is salt water in our seas.

And billions of people around the world live without clean freshwater.

What?

And climate change is making it worse, with droughts and pollution damaging freshwater supplies.

We have to do something.

Number two, there is a name for the smell of rain when it hits the ground.

It's called petricor.

What does that mean?

...