We can make clocks that keep accurate time for millions of years. We can also make clocks with such high resolution they tick one billion billion times per second. So why can't we make a clock that does both?

Today, NASA announced that there is...occasionally...flowing, liquid water on the surface of Mars. What?!

The Kepler mission has determined that terrestrial planets are extremely common, and may orbit most stars in the Milky Way. But these planets are difficult to directly image because they're dense and small. Our Sun is about ten billion...

Today, NASA announced that there is...occasionally...flowing, liquid water on the surface of Mars. What?!

It's late, pitch dark and a self-driving car winds down a narrow country road. Suddenly, three hazards appear at the same time. With no human at the wheel, the car uses smart eyes, sensors that'll resolve these details all in a...

Designer and architect Neri Oxman is leading the search for ways in which digital fabrication technologies can interact with the biological world. Working at the intersection of computational design, additive manufacturing, materials...

Failed at keeping your resolutions in the past? Psychologists have some insights and advice for you to stick to them this year.

The newest 8K TVs have 33 million pixels - but can you even see that many?

NASA’s Magellan mission gave us unprecedented insight into Venus’s rocky surface, and even now, more than 25 years after the mission ended, it’s still one of our main tools for learning about our mysterious, next-door neighbor.

As an expert on cutting-edge digital displays, Mary Lou Jepsen studies how to show our most creative ideas on screens. And as a brain surgery patient herself, she is driven to know more about the neural activity that underlies invention,...

For the first time ever we have visual confirmation that black holes actually exist and we got it with a telescope the size of our planet.

Our universe is strange, wonderful and vast, says astronomer Natasha Hurley-Walker. A spaceship can't carry you into its depths (yet) -- but a radio telescope can. In this mesmerizing talk, Hurley-Walker shows how she probes the...

Explore how to use a light microscope with the Amoeba Sisters! Includes microscope parts, how to use, and some helpful tips! Additionally, this video introduces a few types of light microscopes as well as electron microscopes. Expand...

Drawing curves that fill all of space, and a philosophical take on why mathematics about infinite objects can still be useful in finite contexts.

In which John Green teaches you a bit about the 4th of July. In this special short Crash Course, John celebrates American Independence Day by teaching you how the holiday came to be on the 4th of July, and the many ways that Americans...

Drawing curves that fill all of space, and a philosophical take on why mathematics about infinite objects can still be useful in finite contexts.

Are aliens watching Earth TV?

Today we take a look at the history and capabilities of spy satellites.

The search began with a physicist checking for sources of static on phone calls in the 1930s, but it took several decades to finally make one of the biggest discoveries in astronomy, Sagittarius A*.

Imagine a future where nobody dies— instead, our minds are uploaded to a digital world. There they could live on in a realistic, simulated environment with avatar bodies, calling in and contributing to the biological world....

Why is it so hard to speak up and productively disagree at work? Leadership and organization coach Betsy Kauffman shows how to bring the candid conversations that usually happen at the watercooler out into the open with four practical...

Today Phil explains how telescopes work and offers up some astronomical shopping advice.<br/>

The German workplace is generally harmony-oriented, in part because there is such an elaborate system of regulations. There’s a strong desire to deal with difficult or sensitive issues clearly, logically, and fairly. Conflicts can...

This video outlines elements of a plot to identify the main events of a story.