Baldur was the gentlest and most beloved being in all of Asgard. But lately, he had been plagued by gruesome visions foretelling his own imminent death. Determined to protect her son from these grim prophecies, Queen Frigg travelled...

This Amoeba Sisters video starts with providing examples of prokaryotes and eukaryotes before comparing and contrasting prokaryotic cells with eukaryotic cells! Contents: 00:00 Intro 1:27 Modern Cell Theory 1:37 3 Domains (with examples...

Everyone has the right to a clean environment -- but major disparities exist when it comes to who faces the consequences of pollution. Environmental justice leader Peggy Shepard points to the disproportionate impact that hazardous...

Mister Brown gets a video message from his friend, Ariel Waldman, a real scientist who went all the way to Antarctica to study life that lives under the ice!

Watch the miraculous journey of infant sea turtles as these tiny animals run the gauntlet of predators and harsh conditions. Then, in numbers, see how human behavior has made their tough lives even more challenging.

Jaime Lerner reinvented urban space in his native Curitiba, Brazil. Along the way, he changed the way city planners worldwide see what's possible in the metropolitan landscape.

Most spiders are solitary creatures, but a few species group up instead, creating giant colonies where they live and hunt together.

In which John Green, Hank Green, and Emily Graslie teach you about the Anthropocene, an unofficial geological era that covers the last century or so, in which humanity has made massive progress. We've discovered the Higgs-Boson particle,...

Joan Blades and John Gable want you to make friends with people who vote differently than you do. A pair of political opposites, the two longtime pals know the value of engaging in honest conversations with people you don't immediately...

Nine days before TED2008, filmmaker David Hoffman lost almost everything he owned in a fire that destroyed his home, office and 30 years of passionate collecting. He looks back at a life that's been wiped clean in an instant -- and looks...

Crocodiles, horseshoe crabs and tuatara are animals that have persisted for millions of years, said to have gone unchanged since the days of the dinosaurs. But even the most ancient-looking organisms show us that evolution is always at...

Some of the biggest evolution questions finally answered.

We each want to live a life of purpose, but where to start? In this luminous, wide-ranging talk, Jacqueline Novogratz introduces us to people she's met in her work in "patient capital" -- people who have immersed themselves in a cause, a...

It's never easy to get across the magnitude of complex tragedies -- so when Brenda Romero's daughter came home from school asking about slavery, she did what she does for a living -- she designed a game. She describes the surprising...

Jessi and Squeaks love science mysteries, and today they've teamed up with their friend, Dino, to try and solve one of the biggest mysteries of all: what happened to the dinosaurs?

Did you know that all living things change their environments? It's true. Beavers, deer, worms, and humans all change their environments. It just so happens that humans change our environments in big, obvious ways. In this episode,...

Author Steven Johnson takes us on a 10-minute tour of The Ghost Map, his book about a cholera outbreak in 1854 London and the impact it had on science, cities and modern society.

Every city has its neighborhoods, cliques and clubs, the hidden lines that join and divide people in the same town. What can we learn about cities by looking at what people share online? Starting with his own home town of Baltimore, Dave...

When she was 19, Amy Purdy lost both her legs below the knee. And now ... she's a pro snowboarder (and a killer competitor on "Dancing with the Stars"!). In this powerful talk, she shows us how to draw inspiration from life's obstacles.

This week, John is teaching you about the near-future dystopia in Octavia Butler's Parable of the Sower. Parable of the Sower tells the story of Lauren Oya Olamina, and her life growing up in a post-climate change, semi-lawless America....

We worry that IM, texting, Facebook are spoiling human intimacy, but Stefana Broadbent's research shows how communication tech is capable of cultivating deeper relationships, bringing love across barriers like distance and workplace rules.

Becky Blanton planned to live in her van for a year and see the country, but when depression set in and her freelance job ended, her camping trip turned into homelessness. In this intimate talk, she describes her experience of becoming...

Remote work, while redefining the workplace landscape, seems stuck behind endless video conference calls that hinder free-flowing conversation and collaboration. In the 21st century, is that really the best we can do? Digital...

This week on SciShow Space News, we finally find out what’s causing those dark lines on Europa. Plus, learn how to become space-famous!