water

It can be powered by cast-offs like coconut shells and wood chips.

Horse-powered cars, bombs with cat flaps, self-steering golf balls: Arthur Paul Pedrick may not have been the world's most successful inventor, but he was undoubtedly one of the most creative.

And firefighters can still use them.

Even a mild case may cause foggy thinking.

The pay is great, so long as you don't mind the sharks, dead bodies, and occasional risk of being sucked into a vacuum.

The dome-shaped water reservoir poses a suffocation hazard if dogs manage to get their snouts stuck in it.

Scientists have found a hack to help you quell the sound until the plumber comes.

Not pictured: Blood, poop, or those pesky inflatable water armbands.

Lifeguards deal with everything from dangerous chemicals to poop emergencies. But they're also not above occasionally peeing in the pool.

From 2000 to 2014, a number of "diarrheal incidents" led to thousands of pool-goers getting sick.

If you fail the test, it's time to visit the water cooler.

It's not because people are sticking them in their ears. (Don't do that.) It's for another reason entirely.

I bet you know that wood floats but a rock sinks. But why? Let’s look deep inside each object at its molecules.

In October 1901, a financially strapped 62-year-old decided the quickest way to retire comfortably would be to stuff herself into a barrel and go over Niagara Falls.

The legal limit isn't necessarily what's best for your health.

You don't need to see steam rising from the sink to see the benefits of scrubbing up.

A Denver neighborhood managed to save millions of gallons of water by replacing juniper bushes and grass with native plants that were made to survive in the high desert.