Seventy-two percent of the world's population lives under some sort of autocratic rule, says freedom fighter Leopoldo Lopez. In a rousing call to defend democracy worldwide, he shares the story of his imprisonment and exile for leading...

Otherwise landed in 2004 with its twin - MER-A, better known as Spirit. These six-wheeled golf-cart-sized robots were Swiss army knives of geological lab instruments. Opportunities most spectacular discovery where these cute little...

In the future, we may see more continent-sized dust storms like the one nicknamed Godzilla, which crossed the Atlantic ocean in 2020. And since then, researchers have been looking into what caused such a colossal storm. If we can predict...

Several COVID-19 variants are acting uniquely enough to qualify as a distinct strain. And you might have heard about one on the news: the Delta variant. Today we’re going to talk about what it is, why it’s here, and what you need to know...

Hank fills us in on the four exploratory missions to space that he is most excited about - New Horizons is going to Pluto and the Kuiper belt; Juno is on it's way to Jupiter; Dawn is exploring two large asteroids; Rosetta will land on a...

Hank brings you news from around the universe, including what you can't blame on global warming, why being unfaithful is hazardous to your health, and how to watch a particularly awesome spectacle coming to a sky near you.

What went wrong with SpaceX's Falcon 9 on September 1st? And an update on our old friend Philae!

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...

In the future, we may see more continent-sized dust storms like the one nicknamed Godzilla, which crossed the Atlantic ocean in 2020. And since then, researchers have been looking into what caused such a colossal storm. If we can predict...

Why do some regions experience full-time heat while others are reckoning with frigid temperatures and snow? And why are the seasons reversed in the two hemispheres? Rebecca Kaplan explains how the shape of the Earth's orbit around the...

Researchers think a planet-wide groundwater system may have once existed on Mars, and SpaceX launched the very first commercial crew capsule which docked on the International Space Station!

How do the layers of the ocean mix together? The energy put in by the winds and tides is less than what’s required for the amount of mixing, so what else is bringing the mixing energy? Turns out, it might be very active anchovy...

The Fourth of July, also known as Independence Day, marks the adoption of the Declaration of Independence in 1776, when the American colonies formally declared their separation from British rule. Celebrated with fireworks, parades, and...

What is the REAL meaning for Memorial Day? Every Memorial Day we get a long weekend, spend time with friends and family, BBQ’s and take boat rides, but forget so often what this day is REALLY for. On Memorial Day, we need to remember...

Howcast - Teach your child "These are the Months of the Year," the kids song in this video.

Howcast - Learn what to consider when picking a wedding location from celebrity wedding planner Barbara Esses in this Howcast video.

Howcast - The Fourth of July is a great American holiday, so why not spend it in one of the most historically significant American cities?

Howcast - Learn about the best time of year to visit Paris in this Howcast travel video.

Howcast - Celebrate the freedom of our country with these meaningful ways to be patriotic on the 4th of July.

Howcast - Fourth of July is a great American holiday, so why not spend it in one of the most amazing American cities?

Howcast - On July 4th, 1776, the Continental Congress approved the Declaration of Independence. Commemorate the birth of the United States by celebrating its history.

Howcast - Learn how to say the months of the year in Greek with this Howcast video.

Celebrate the holiday by using these seven tips to stay green this 4th of July.

We’re heading to Scotland in this episode of Travel Smart Weekly, to explore how to spend summer in a land of beautiful landscapes, wonderful coastline, exceptional food and drink, and fun cultural hubs.Simon Calder and Ben Parker...