The Grand Canyon is super-wide and super-deep, which might make you think that the Colorado River, which carved it, is particularly old or powerful. Or at least that's what I thought.

Climate change doesn't just melt ice caps, it also fuels conflict, corruption and division worldwide, explains TED Fellow and journalist Peter Schwartzstein. From droughts in Syria to rising seas in Bangladesh, he explores how climate...

Why Does Earth Have Deserts? For the same reason it has Rainforests: Hadley Cells!!!

We often think of the ocean’s tide as a simple rise and fall, connected to the motion of the Moon. But on any given shore, the reality is much more complex and oceanic scientists have realized recently that there’s another, more...

The democratic process is messy, complicated and often inefficient -- but across Africa, activists are redefining democracy by putting protest at its center. In an illuminating talk, political scientist Zachariah Mampilly gives us a...

MIT grad student Joy Buolamwini was working with facial analysis software when she noticed a problem: the software didn't detect her face -- because the people who coded the algorithm hadn't taught it to identify a broad range of skin...

Science columnist Lee Hotz describes a remarkable project at WAIS Divide, Antarctica, where a hardy team are drilling into ten-thousand-year-old ice to extract vital data on our changing climate.

It's been said that when an elder dies, it's as if a library is burned. Anthropologist Elizabeth Lindsey, a National Geographic Fellow, collects the deep cultural knowledge passed down as stories and lore.

How To Avoid the Next Atlantis

We often think of the ocean’s tide as a simple rise and fall, connected to the motion of the Moon. But on any given shore, the reality is much more complex and oceanic scientists have realized recently that there’s another, more...

Why Does Earth Have Deserts? For the same reason it has Rainforests: Hadley Cells!!!

Throughout Earth's history, climate has varied greatly. For hundreds of millions of years, the planet had no polar ice caps. Without this ice, the sea level was 70 meters higher. At the other extreme, about 700 million years ago, Earth...

Have you noticed how the full moon looks bigger on the horizon than high overhead? Actually, the two images are exactly the same size -- so why do we perceive them differently? Scientists aren't sure, but there are plenty of intriguing...

This week we build on our naked eye observations from last week and take a look at the cyclical phenomena that we can see at work in the universe.

In which Adriene and Jacob teach you about how and why prices rise. Sometimes prices rise as a result of inflation, which is a pretty normal thing for economies to do. We'll talk about how across the board prices rise over time, and how...

It might seem like magic when you put some batter in the oven and pull out a fluffy cake, but it's actually science! Join Jessi and Squeaks as they bake a cake and explain how the ingredients react with each other to make a tasty treat!

If you ask someone to picture a thunderstorm, chances are they will have no problem slipping into a memory of dark clouds and bright flashes screaming out from them. But, incredibly, they’re probably picturing the tame version of...

Chak Ek', the morning star, rose from the underworld to the surface of the eastern sea and on into the heavens. His brother K'in Ahaw, the sun, followed. Though Chak Ek' had risen first, K'in Ahaw outshone him, and the resentful Chak Ek'...

Imagine setting sail from Hawaii in a canoe. Your target is a small island thousands of kilometers away in the middle of the Pacific Ocean - a body of water that covers more than 160 million square kilometers. For thousands of years,...

Pope Francis -- Jorge Mario Bergoglio -- was born in Buenos Aires, Argentina in 1936 and is the eldest of five children.

Have you heard that inflation is spiraling out of control? Have you heard that we're in a recession? Have you heard that people have less spending power today than their parents did 30 years ago? If you're on social media (and who...

Howcast -Learn how to read your horoscope from famed astrologer Jenny Lynch in this Howcast video.

Howcast -Learn how to read the Judgment tarot card from expert Ellen Goldberg, M.A. in this Howcast video.

Howcast -Learn how to read the Fool tarot card from expert Ellen Goldberg, M.A. in this Howcast video.