In the grand scheme of history, modern reality is a bizarre exception when compared to the worlds of ancient, precolonial and Indigenous civilizations, where myths ruled and gods roamed, says historian Greg Anderson. So why do Westerners...

* Viewer discretion advised. This video includes discussion of mature topics and may be inappropriate for some audiences. From our fear of women's bodies to our sheepishness around the word "nipple," our ideas about sex need an upgrade,...

If you could travel back in time, and you killed your grandfather, would you be killing your future self? What do physics, complexity theory, and computer science have to say about this famous murderous time-travel paradox?

Today we’re going to talk about climate change which is when there is a change in the average weather patterns in a region over a long period of time - these changes can be natural or human-caused. We’ll discuss the main driving forces...

Adventure Time is an animated kids show on the Cartoon Network that is super popular, not just with the kids, but with full grown adults too! Why would a bunch of serious adults, including Mike's Mom, watch Adventure Time? We think its...

In which John Green concludes teaching you about Chinua Achebe's Things Fall Apart. You'll learn about the historical contexts of Things Fall Apart, including 19th century colonization and 20th century decolonization. We're going to...

Nostalgia was once considered an illness confined to specific groups of people. Today, people all over the world report experiencing and enjoying nostalgia. But how does nostalgia work? And is it healthy? Clay Routledge details the way...

Scientists have found at least three cycles in nature that can be traced back to the alignment of the planets. And while they won’t tell you anything about your love life or personality, by studying them, we can learn about our planet’s...

Lurking in the depths of the mathematics of Einstein's general relativity is an object even stranger than the mysterious black hole. In fact it's the black hole's mirror twin, the white hole. Some even think that these could be the...

While we like to imagine little green men, it's far more likely that life on other planets will be microbial. Planetary scientist Nathalie Cabrol takes us inside the search for microbes on Mars, a hunt which counterintuitively leads us...

Pluto's heart is revealing itself to be a major influence on the dwarf planet’s landscape and atmosphere, and scientists used atom probe tomography (APT) for the first time on lunar soil to study it atom by atom!

We don't need a time machine to learn from the past (but let us know if you find one)! Air bubbles trapped in ice for millennia and ancient pollen grains can tell us a lot about climate shifts hundreds of thousands of years ago!

TED Fellow and journalist Evgeny Morozov punctures what he calls "iPod liberalism" -- the assumption that tech innovation always promotes freedom, democracy -- with chilling examples of ways the Internet helps oppressive regimes stifle...

We don’t know what happens to stuff when it gets sucked into a black hole, but in the same instance, we don’t know what happens to the black hole. There’s a possibility that sucked up stuff might actually give the black hole “quantum hair”.

Where does all the stuff in the universe come from?

How do we tell stories of humanity and nature at a time when our planet is burning? Novelist Elif Shafak invites us to listen to the trees, whose experience of time, stillness and impermanence is utterly different from our own. "Hidden...

Why is the past different from the future? Caltech physicist Sean Carroll explains how the arrow of time is not an intrinsic property of physics, but rather an emergent feature.

Earlier today, mission specialists with NASA's Mars Science Laboratory announced that they have found, for the first time, evidence of an ancient environment on Mars that could have sustained life. Hank tells us the specifics in this...

Find out how time and space switch roles when we move beyond the event horizon of the black hole.

Unfortunately, time machines don't exist, but there are other ways to learn about our sun's past.

Did you know SciShow has a whole channel dedicated solely to space? Well, we hope you packed warm, cause we’re taking you on a tour through the solar system with these SciShow Space episodes!

Machine learning isn't just for simple tasks like assessing credit risk and sorting mail anymore -- today, it's capable of far more complex applications, like grading essays and diagnosing diseases. With these advances comes an uneasy...

About 2500 years ago, the writing of history as we understand it didn't really exist. Then, a man called Herodotus witnessed the Persian invasions of Greece and decided to find out why they happened. Mark Robinson investigates how the...

It's tricky to study the particles of our Sun because Earth’s magnetic field deflects them, but scientists have found ways to do it! They're helping us understand things like the Sun’s origin, what it's made of, and how it might affect...