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How An Infinite Hotel Ran Out Of Room

Adults Creativity Education Life Philosophy Science

If there's a hotel with infinite rooms, could it ever be completely full? Could you run out of space to put everyone? The surprising answer is yes -- this is important to know if you're the manager of the Hilbert Hotel.

What�s in the air you breathe? - Amy Hrdina and Jesse Kroll

Adults Health Human Nature

Together, nitrogen, oxygen and argon make up 99.93% of our air. So what�s the other .07%? Find out what makes up the air you breathe.

TRUE Limits Of Humanity � The Final Border We Will Never Cross

Adults Education Human Life

Is there a border we will never cross? Are there places we will never reach, no matter how hard we try? It turns out, there are. Even with sci-fi technology, we are trapped in a limited pocket of the Universe and the finite stuff within it. How much universe is there for us and how far can we go?

British Columbia's Fall Trip | National Geographic

Adults Life Nature Travel

Home to one of Canada's most notorious wine regions, British Columbia is a true destination for wine lovers. There's also iconic mountains, waterfalls, and parks to explore. Partner Content for Destination Canada.

How one design flaw almost toppled a skyscraper - Alex Gendler

Adults Cities Construction History Engineering Architecture Industry

Dig into the unique engineering of New York City�s Citicorp Center tower, and the design flaw that threatened to topple it.

Why We Faint (When Other Animals Don't)

Adults Animals Health Human Science Biology

Humans are the only animals known to faint due to triggers like shock, fear, or pain; this is due to a combination of our massive brains and upright stance.

The Ultimate Guide to Black Holes

Adults Education Science Space Physics

If you want to continue thinking about black holes a tad more, you can do so by getting one of the many black hole related things the Kurzgesagt team made with love: bit.ly/3dRJj71

Super Quick Pasta 3 ways | Jamie Oliver

Adults Family Film Food Cooking

Pasta is always a good idea!! Jamie has 3 of his favourite simple pasta sauces that you can knock up in minutes when the carb craving calls! Using minimal ingredients but still packed full of flavour these are a winner.

This Unstoppable Robot Could Save Your Life

Adults Construction Creativity Science Technology

This robot has applications to archaeology, space exploration, and search and rescue � with a simple elegant design inspired by a plant.

How do wind turbines work?

Adults Nature Science Technology Energy Environment

Explore how wind turbines convert wind into electricity, and the challenges of powering the world entirely with wind energy.

Proteins: Explained

Adults Education Food Science Biology Health

You might already know that proteins are a fundamental part of your diet, but they're much more than that.

Whatever happened to acid rain? - Joseph Goffman

Adults History Life Nature Environment Science Global Warming

Discover what causes acid rain, and how scientists were able to largely eliminate this major environmental threat.

The Mystery of Magnetic Worms - Smarter Every Day 253

Adults Life Nature Science Technology Biology

Metal in Worms?

The Secret Culture of Orcas | Podcast | Overheard at National Geographic

Adults Animals Life Nature Science

Scientists are discovering that orcas, among the most social and intelligent of marine animals, have unique family structures and behaviors, passed from one generation to the next.

The surprising secrets of hummingbird flight

Adults Animals Life Nature Science

Dig into the incredible fighting, feeding, and flying capabilities of hummingbirds.

Which Will Kill You First?

Adults Biology Health Human Science

The body can get a whole lot colder - but not a whole lot hotter - before we die. Why is that?

Brad Makes Fermented Pasta Sauce | It's Alive | Bon App�tit

Adults Film Food Human Cooking

It's Alive with Brad Leone is back for episode 80 and this time Brad is making fermented pasta sauce.

New Feature - Release Exercise Answers

Teachers Teacher Cafe Education

Exercise answers are now hidden from the students by default. You can release the answers at any time by clicking on this icon.

New Feature - Share Exercises with Multiple Classes

Teachers Teacher Cafe Education

Teachers can now share an exercise with multiple classes at once.

This is why we can't have nice things

Adults Education Life Technology Humor

This video is about stuff: light bulbs, printers, phones and why they aren't better.

Why every world map is wrong - Kayla Wolf

Adults History Human World Science

Dig into the inaccuracies of flat maps and how different map designs can shift our point of view.