The human back is a design disaster
Lesson duration 06:40
Everyone who lives long enough is likely to experience back pain. And the cause isn't just aging—...
Lesson duration 06:40
Everyone who lives long enough is likely to experience back pain. And the cause isn't just aging—...
Lesson duration 04:47
In 2017, researchers off the Bulgarian coast discovered the oldest intact shipwreck ever found....
Lesson duration 05:54
Your antivirus squad is up against a code that’s hijacked your mainframe. What you’ve learned...
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Stretching over roughly nine million square kilometers and with sands reaching temperatures of up...
Lesson duration 16:06
Everyone experiences loss, but how do you cope with the tough moments that follow? Resilience...
Lesson duration 04:53
Baritone thunder. Snarling winds. Consuming downpours. Okeechobee, the hurricane of 1928, forced...
Lesson duration 05:06
Humanity has always adapted to changing weather and moved to regions that best support cultural...
Lesson duration 04:35
Along the Nile River, in what is now northern Sudan, lay the ancient civilization of Kush. Though...
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Inside our cells, each of us has a second set of genes completely separate from our 23 pairs of...
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Have you found yourself staying up late, joylessly bingeing TV shows and doomscrolling through...
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Over 2,500 years ago, one of ancient Greece’s most celebrated popstars and erotic poets...
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The year is 1249 CE. King Louis IX is sailing the Nile, threatening to overthrow the sultan and...
Lesson duration 06:19
Smuggling yourself aboard the rogue submarine was the easy part. Hacking into the nuclear missile...
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Eight ferocious notes open one of the most explosive pieces of music ever composed. Ludwig van...
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While searching for a kidney donor, Karen Keegan stumbled upon a mystery. After undergoing...
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In 2009, a satellite circled Earth, scanning and sorting the wavelengths reflecting off the...
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The Collatz Conjecture is the simplest math problem no one can solve — it is easy enough for...
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What's your passion? Social entrepreneur Noeline Kirabo reflects on her work helping...
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Outside of China, Mandarin and Cantonese are often referred to as Chinese dialects, despite being...
Lesson duration 05:52
In 1776, a powerful empire was born in North America. The Lakotas had reached the Black Hills,...
Lesson duration 15:13
"The free, online, mainstream pornography that teenagers are most likely to see is a completely...
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In 1968, Dr. Robert Ho Man Kwok felt ill after dinner at a Chinese restaurant and wrote a letter...
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In 1980, Paul Ehrlich and Julian Simon bet $1,000 on a question with stakes that couldn’t be...
Lesson duration 11:38
Staying warm by making your own heat takes a ton of energy. And that brings up a paradox, because...