Lice... the mere mention of them is enough to make most people all itchy. Well, get ready to get scratching, because we've compiled seven squirm-inducing lice facts on this week's List Show!

Lice are tiny bugs that love to live in people's hair and suck their blood! Anyone can get lice and they can be tricky to get rid of, but Jessi and Squeaks are here with some lice facts that could help you avoid these itchy little critters!

Marine mammals are famously large, but why is that? And is there a polar bear-sized sea otter in our future?

What's a marine biologist doing talking about world hunger? Well, says Jackie Savitz, fixing the world's oceans might just help to feed the planet's billion hungriest people. In an eye-opening talk, Savitz tells us what’s really going on...

If you hear the word “baby-faced” you might picture a doe-eyed celebrity who never seems to age. But, really, you should be thinking of the axolotl. However, it is possible to transform these otherwise forever-babies, causing them to...

Ever wondered what makes those balls of white foam you sometimes find clinging to plants? Spittlebugs create these bubbly cocoons after feeding on a plant’s fluids; but unfortunately, their eating habits help transmit a deadly bacteria...

We're off to fact-checking school. This time, John Green is teaching you how to fact-check like the pros. We're going to walk through the steps that professionals follow, including figuring out who is behind the information we read, why...

We're headed towards a global food crisis: Nearly 3 billion people depend on the ocean for food, and at our current rate we already take more fish from the ocean than it can naturally replace. In this fact-packed, eye-opening talk,...

Blue whales are the largest animals on the planet, but what helps them grow to the length of a basketball court? Asha de Vos explains why the size of krill make them the ideal food for the blue whale -- it's as if the blue whale was made...

Birds fly, and fish swim. We learn this when we are children. But not everything in nature is quite so simple… Meet Limacina helicina, an artic-dwelling sea butterfly that flies through the water.

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There aren't many creatures as safe and chill as the humble sea sponge, right? Well, not so fast! It turns out there's a whole family of carnivorous sponges that trap and eat small animals using spines and migrating stomaches!

Bees and flowers are as classic a pair as peanut butter and jelly. But recent research suggests there's a third, much tinier partner in this relationship!

When you picture the lowest levels of the food chain, you might imagine herbivores happily munching on lush, living green plants. But this idyllic image leaves out a huge (and slightly less appetizing) source of nourishment: dead stuff....

In this video Paul Andersen explains the important relationships that exist in ecosystems. He starts by delineating between organisms and their environment. He explains how food webs can be used to show energy and matter flow in a...

Dive into the world of aquaculture and see how restorative ocean farming could play a vital role in helping our coastal communities, our oceans and our climate. -- For billions of people, seafood provides a significant source of...

Paul Andersen differentiates between biotic and abiotic factors. He explains how both abiotic and biotic factors can affect organisms at the level of the cell, the population and even the ecosystem. The complexities of biofilms,...

In which John Green teaches you about the changes wrought by contact between the Old World and the New. John does this by exploring the totally awesome history book "The Columbian Exchange" by Alfred Cosby, Jr. After Columbus...

Paul Andersen explains the importance of genetic variation within a population. He begins with a discussion of the devil facial tumor that is a form of cancer transferred between Tasmanian devils. He then explains how a decrease in...

Nature reveals itself to us in unique ways, if we stop and look at the world through a window of time, says photographer Stephen Wilkes. Using a special photographic technique that reveals how a scene changes from day to night in a...

In a world that's wasting more food than ever before, why do one in nine people still go to bed hungry each night? Social entrepreneur Jasmine Crowe calls for a radical transformation to our fight to end global hunger -- challenging us...

Most of us don't need more than one whiff to identify that generally unpleasant, characteristic smell we call body odor. But it's a surprisingly complex phenomenon, influenced by our genetic makeup, age, diet, and hygiene. So what is...

New ReviewAlice and Ted look for Imps in the woods. On the way they learn about static electricity and habitats, and spot animals including hares, rabbits, ducks, corvids and more.

Welcome back to the Fluctus Channel, as we discover how the U.S. military keeps its troops fed both in the field and at sea. From MREs and mobile field kitchens to advanced galleys aboard aircraft...

A video entitled "Recursive Formula Geometric" that covers the adding numbers to a given sequence.