These are the cities with the worst traffic (continent by continent)

Europe’s and North America’s leaders are quite surprising.

Waste not, want not: astronauts to turn pee into nutrients, tools on deep-space missions

Stay hydrated up there, ladies and gents.

Untouched 106 year old fruitcake found in the Antarctic — it’s probably still edible

No one touched it for more than a century, not even the penguins.

What’s the difference between HIV and AIDS

You shouldn’t use the two interchangeably.

What does 5-sigma mean in science?

In science, there’s no room for certainty. But we can get close enough by using statistical significance.

How alleles make us who we are

It has to do with your parents, and a bit of luck.

A history of how computers went from stealing your heart, to stealing your job

They changed our society from the ground up. And will do so again.

How old is the oldest tree?

it’s a surprisingly long time.

National Geographic chooses winners for their 2017 Travel Photographer of the Year — and they’re stunning

The winner is absolutely amazing.

What are the moons of the solar system and how many are there

An overview of some of the most important natural satellites in our solar system. They’re quite a few.

What is THC: the main psychoactive ingredient in marijuana

THC has beneficial health outcomes but also carries risks. Let’s see what the science says about it.

Thought octopuses only live in water? Watch David Attenborough explain how the only land octopus hunts

If you thought octopuses were amazing, wait ’till you see this.

World’s first smiley face found, painted 3,700 years ago on a jug in Turkey

:O

Animal files: Kiwi birds— unique birds

Find out why!

What’s a Galileo thermometer and how do you read it?

While it’s not the most precise instrument, it’s certainly one of the most attractive.

Plant-like robot can grow 250 times its length, manipulate objects, form complex shapes

Awesome!

How hot is a sauna, and other steamy facts

There’s a big difference between wet saunas and dry saunas.

Tesla Model 3: All About The Most Anticipated Car Ever

A glimpse at the future: the electric, self-driven vehicle of choice for the average American home.

Don’t like to wake up to your alarm clock? Try this gentle birdsong app from Carnegie Museum

Sweeten those nasty mornings with a charming wake-up call.

Here’s where you’d end up if you dug straight through the Earth

Spoiler alert: it’s probably not China. Or Australia.