A geometry/probability question on the Putnam, a famously hard test, about a random tetrahedron in a sphere. This offers an opportunity not just for a lesson about the problem, but about problem-solving tactics in general.

A geometry/probability question on the Putnam, a famously hard test, about a random tetrahedron in a sphere. This offers an opportunity not just for a lesson about the problem, but about problem-solving tactics in general.

If you've ever played with a ouija board, you might have gotten the spooky sensation of an other worldly presence. But really, that's just your brain playing tricks on you.

It's a good day to be a pirate. Amaro and his four mateys _ Bart, Charlotte, Daniel, and Eliza have struck gold _ a chest with 100 coins. But now, they must divvy up the booty according to the pirate code - and pirate code is notoriously...

Timothy Prestero thought he'd designed the perfect incubator for newborns in the developing world -- he even won awards for it. But he and his team learned a hard lesson when their incubator completely failed to catch on. Hear his...

Artificial intelligence takes on Texas Hold 'Em.

Different hospitals produce different results on different procedures. Only, patients don’t know that data, making choosing a surgeon a high-stakes guessing game. Stefan Larsson looks at what happens when doctors measure and share their...

Here's a stat worth knowing: In the UK, 63% of men who finish short-term prison sentences are back inside within a year for another crime. Helping them stay outside involves job training, classes, therapy. And it would pay off handsomely...

Playing sound effects both pleasant and awful, Julian Treasure shows how sound affects us in four significant ways. Listen carefully for a shocking fact about noisy open-plan offices.

It seems like nutrition studies contradict a lot, and it’s practically impossible to get a straight answer on whether a given food or supplement is good for you. But why?

Low-status neighborhoods in the US are often stuck between stagnating assistance from the government and gentrification at the hands of real estate developers. The result is that the brightest minds are convinced that "success" means...

In this video Paul Andersen explains how his new video series for AP Physics 1 & 2 will be organized. He hopes to have the entire video series completed by this fall.

It's 1954. Vietnamese nationalists are on the verge of securing an independent Vietnam under communist leader Ho Chi Minh. U.S. President Eisenhower claims that by virtue of the "falling domino principle," communist control of Vietnam...

Two perfectly rational gingerbread men, Crispy and Chewy, are out strolling when they're caught by a fox. Instead of simply eating them, he decides to put their friendship to the test with a cruel dilemma. He'll ask each gingerbread man...

New ReviewMaster strategic thinking: How to Think Strategically in 10 minutes – for Project Professionals. Strategic Thinking is the #1 skill for advanced Project Managers, and this video is your playbook.

New ReviewThinking of just moving on once a project is "done"? Think again! A comprehensive Project Closure Report isn't just bureaucracy – it's your key to documenting success, learning from challenges, and setting future projects up for even...

New ReviewLet's be honest math anxiety is real. I had it, and many students have it if they are good at math or not. In this video I offer some tips to deal with with it

This week's Healthcare Triage News is likely to upset some docs. Get your popcorn ready!

More than once, I've considered packing up the family and taking a job in a different city. Each time, my wife and I thought about what it might do to them if we moved. But we were just guessing. There are data! This is Healthcare Triage...

Cystic fibrosis is an inherited disorder that affects the lungs, pancreas, intestines and other organs. A genetic mutation leads to secretory glands that don't work well; lungs can get clogged with thick mucus; the pancreas can become...

There have been a lot of stories about using behavioral economics to change wide array of human behaviors. Studies have looked at adherence to treatments, weight control, and lots of other areas, and have found that trying to change...

Last week we started our deep dive into the RAND Corporation’s comprehensive report on early childhood programs. We talked about how they’re defined, and how they’re targeted. Great. But do they work? What are the outcomes they improve?...

You guys and your Vitamin D. You ask me on HCT Live, you ask me on comments, you ask me on Twitter. I'm amazed at the persistence of this question, as study after study seems to show that Vitamin D isn't doing most of us much good at...

When I was a kid, my parents refused to let me drink coffee because they believed it would "stunt my growth". It turns out, of course, this is a myth. Studies have failed, again and again, to show that coffee or caffeine consumption are...