How many species are there on Earth? In biology, this is one of a fundamental question that we still don't have a very good answer for. Imagine if chemists didn't know all the elements of the periodic table, or if physicists didn't know...

Nearly every other year the transistors that power silicon computer chip shrink in size by half and double in performance, enabling our devices to become more mobile and accessible. But what happens when these components can't get any...

Hank talks about why it is so difficult for scientists to predict earthquakes in the short term.

Many ideas have come and gone, but Project Daedalus was a uniquely ambitious plan from the 1970s that never quite came to be.

One way to help us live on Mars would be to terraform the planet. Some scientists think we might be able to do that by giving it a new magnetic field!

Even a death-defying magician has to start somewhere. High-wire artist Philippe Petit takes you on an intimate journey from his first card trick at age 6 to his tightrope walk between the Twin Towers.

In 2011, a group of researchers conducted a study designed to find an impossible result. Their study involved real people, truthfully reported data, and commonplace statistical analyses. So how did they do it? The answer lies in a...

Chances are, when you hear the phrase "Special Effects," you may have images pop into your mind. The Hulk smashing a city, a lightsaber fight, or maybe an alien world. But effects can be much more subtle and have been around really since...

How many stars are there in the universe? This question leads Hank to a couple other questions - How many stars can we see from Earth? How many stars are there in our galaxy? - but the answer to the original question proves elusive.

Hank summarizes the five reasons why infrared telescopes were supposed to be impossible to build, and then describes how a team of scientists and engineers overcame those obstacles to build the James Webb Space Telescope.

If you live in the United States, you might have recently gotten a credit card with a microchip on it. But what does this chip do that makes it any different than the magnetic strip on the back of the card?

Fourteen Greenlands could fit in Africa— but you wouldn't guess it from most maps of the world. The fact is, every world map humans have ever made is wrong. Actually, it's impossible to make a flat map of the whole spherical world 100%...

Hank takes a break from the desk to bring you to the lab in order to demonstrate some important points about the practical side of chemistry - experimentation in the laboratory. You'll learn what to wear in the lab, how to dispose of...

People have been grappling with the question of artificial creativity -- alongside the question of artificial intelligence -- for over 170 years. For instance, could we program machines to create high quality original music? And if we...

From 2016 to 2019, the world saw record-breaking heat waves, rampant wildfires, and the longest run of category 5 tropical cyclones on record. The number of extreme weather events has been increasing for the last 40 years, and current...

We're just as fascinated as the rest of you with predicting how the ZOMBIE APOCALYPSE will start. One surprisingly real scenario is that it could start in SPACE! Especially given the crazy effects space has on bacteria and viruses, and...

The video explores George Orwell's novel "1984" and its themes of language manipulation, propaganda, and control. It highlights how the use of language, such as doublethink and newspeak, can be wielded as tools of power to shape and...

This video demonstrates how to identify the main idea in a poem.

A video entitled "Complement" which shows what a compliment is and how it is useful.

The 9 companies that will dominate AI. Artificial Intelligence or AI, it is said by many, will be man’s last invention. Why? Because AI is more than just hardware and software, AI will allow machines to learn. ...

Howcast - Learn how to use feminine nouns and how to use "la" from Spanish teacher Andrea Cukier in this Howcast video.

Howcast - Learn three tips on practicing archery from the pros at Queens Archery in this Howcast video.

Howcast - Learn about the importance of figure drawing from professional artist Kevin Kobasic in this illustration and drawing tips video from Howcast.

Howcast - Learn how to know if a bone is broken, sprained, or fractured in this first aid video from Howcast with Nurse Mary.