Why does February only get 28 days when all the other months get 30 or 31? The answer is part superstition, part politics, and parts astronomy. Basically, it's the Romans' fault.

Concrete is responsible for 8% of humanity’s carbon emissions because making its key ingredient - cement - chemically releases CO2, and because we burn fossil fuels to make it...

Is there something you've always meant to do, wanted to do, but just ... haven't? Matt Cutts suggests: Try it for 30 days. This short, lighthearted talk offers a neat way to think about setting and achieving goals.

In today's episode Hank talks about hair: What's it good for, what's it made of, and why do we have less than other mammals?

To find the path to long life and health, Dan Buettner and team study the world's "Blue Zones," communities whose elders live with vim and vigor to record-setting age. In his talk, he shares the 9 common diet and lifestyle habits that...

On October 4, 1957, the Soviet Union launched the satellite Sputnik and, with it, an international space race. The United States and the Soviet Union rushed to declare dominance of space for 18 years, until the two countries agreed to a...

The process of human baby making seems pretty straightforward: egg+sperm+time=baby. But hold on to your ovaries, folks! It’s pretty rare, but sometimes, days or weeks after a person gets pregnant, they can get pregnant again in a process...

At this moment, three hundred million women across the planet are experiencing the same thing: a period. The monthly menstrual cycle that gives rise to the period is a reality that most women on Earth will go through in their lives. But...

The hair on your scalp can get really long, but your leg hair doesn't sweep the floor. Why not?

Since January 2012, SciShow has been uploading hard science and good times to viewers just like you around the world. Now, after nearly two years -- and a million subscribers(!) -- we think it's time to take our relationship to a whole...

Shopping is about more than just what you buy: it's a treasure hunt to discover something new, a negotiation to get a great deal, a time to catch up with friends and family. But for many, online shopping has turned the experience into an...

On January 8, 2011, Congresswoman Gabby Giffords was shot in the head while meeting constituents in her home town of Tucson, Arizona. Her husband, the astronaut Mark Kelly, immediately flew to be by her side. In this emotional...

In this episode of Crash Course Astronomy, Phil takes you through the cause and name of the Moon's phases.

Have you ever noticed the moon hanging out in the daytime sky and wondered why? Join Jessi and Squeaks to find out!

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...

Improve your English with our original drama series. In this episode, you’ll hear real English conversations, learn everyday expressions, and practice listening comprehension in a fun, story-driven format. For learners at the...

We're back, and it's 2018, y'all. Let's talk about what's happeing with CHiP, taxes and the individual mandate, and the Obamacare exchanges.

Last week, we gave the Trump department of Health and Human Services some credit for approaching the administration Obamacare as honest brokers. This week, it's back to sabotaging the ACA.

In this short math video we will determine the minimum solution of an inequality. We will be presented with a real world situation and an inequality that models the real world situation. The solution of an inequality is a set of values...

In this shorts math video we will review how to write an exponential function to answer a standardized math test question. We will identify the key information provided in the problem - initial amount, rate of increase or decrease, and...

Biology and Psychology are interconnected sciences. In this video we analyse the stages of prenatal development to understand what is happening in the womb during pregnancy, and how this connects to psychological development. Given that...

Customs among the Singaporeans vary greatly depending on an individual’s ethnicity and religion. Explore how the Chinese celebrate the Chinese New Year, which marks the beginning of the lunar year and is by far the most important annual...

Some management practices in Japan are distinctly Japanese, such as the formal rotation system in which personnel get relocated every two to three years—sometimes overseas. Many salarymen end up living apart from their families, often in...

Sports empires today move like tech giants, centralizing operations to drive efficiency and maximize massive profits.⁠ Now, the world’s most valuable ownership groups are worth far more than $10 billion. They've amassed portfolios of...