Economics PhD Sebastião Salgado only took up photography in his 30s, but the discipline became an obsession. His years-long projects beautifully capture the human side of a global story that all too often involves death, destruction or...

Carbon dating transformed fields like archeology and paleontology, but its use might be in danger.

Building a pandemic-free future won't be easy, but Bill Gates believes that we have the tools and strategies to make it possible -- now we just have to fund them. In this forward-looking talk, he proposes a multi-specialty Global...

Sometimes sneezing can be really inconvenient, but why does a technique made popular by cartoon shows seem to be effective at stopping them?

After decades of research and billions spent in clinical trials, we still have a problem with cancer drug delivery, says biomedical engineer Elizabeth Wayne. Chemotherapy kills cancer -- but it kills the rest of your body, too. Instead...

Studies have found that even some of the most well-known home remedies don’t work, and sometimes they do more harm than good. Chapters HONEY FOR ALLERGIES BUTTER ON THERMAL BURNS 2:15 VINEGAR FOR HEAD LICE 4:42 4 IPECAC FOR POISONING...

Earthworms may be good for your garden, but they also have the potential to disrupt forest ecosystems across much of North America.

If you're ticklish, you know that you can't stop from laughing and wiggling around when you get tickled! But why does your body react this way, and why can't you stop it? Jessi's here to fill you in!

Have you ever been so cold that your body shakes really fast? That’s called shivering, and Jessi and Squeaks are going to explain what causes it!

As cinema started to take off, things like "single viewer" devices weren't going to cut it as the medium advanced. In this episode of Crash Course Film History, Craig talks to us about the Lumiere brothers, their invention of the...

In which John Green teaches you about the rise of the conservative movement in United States politics. So, the sixties are often remembered for the liberal changes that the decade brought to America, but lest you forget, Richard Nixon...

It's snowing and Mister Brown needs to go put some salt on the Fort's front steps. But Squeaks wants to know, why do we put salt on icy sidewalks?



Second Grade Next Generation Science...

It is time to close the funding gap for Black female-led start-ups the world over, says entrepreneur Temie Giwa-Tubosun, whose company LifeBank delivers life-saving medical supplies to remote areas in Africa. Today, LifeBank operates...

In this final segment on the four fundamental forces of physics, Hank tackles the magnetic force, the second of the two ways in which electromagnetism is apparent in the universe

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...

Jamila Lyiscott is a “tri-tongued orator;” in her powerful spoken-word essay “Broken English,” she celebrates — and challenges — the three distinct flavors of English she speaks with her friends, in the classroom and with her parents. As...

What exactly is culture? This week we’re going to try to answer that, and explain the difference between material and non-material culture. We’ll look at three things that make up culture: symbols, values and beliefs, and norms. We’ll...

How much does the presence of other people affect our willingness to step in when someone needs help?

When scientists are planning missions, they sometimes have to take into account the fact that the light from the Sun pushes on the spacecraft. But with solar sails, they can also use that pressure to propel the craft along.

Your genetic code is neat, but could be better!

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...

Although coal is such an amazing energy source that we've kept using it despite the harm it causes, today we may be better poised to stop using it than at any previous time in history.

I know things can seem a bit overwhelming when you’re out of school, there are no more grades, and all of a sudden people are talking about five-year plans when it feels like you don’t know what’s happening in five weeks. But we’ve got...

Flowers tend not to own calendars, so how do they know when to bloom?