Plastics are everywhere -- they're in our favorite electronic devices, they package our food and insulate our homes. Today, the total mass of plastic is twice the total mass of all living organisms on the planet, and it's starting to...

Have ever wondered how digital illustrations are made? This video explains the basics.

Today we’re going to talk about the link between population and food energy. As the world's population keeps growing, finding ways to provide enough food and water for everyone while supporting a sustainable environment can be tricky! ...

Meet the "Row-bot," a robot that cleans up pollution and generates the electricity needed to power itself by swallowing dirty water. Roboticist Jonathan Rossiter explains how this special swimming machine, which uses a microbial fuel...

Worried about turning into your parents? Hank unpacks the connection between personality, genetics, and upbringing. Ultimately, though, you are your own person.

In our final episode of Crash Course Geography we're going to take a look towards the future, and to do that we'll need to revisit our fundamental geography tools: space, place, and human-environment interactions! We'll talk about the...

If gigantic googly eyes make you want to run away, it’s because you are responding to a supernormal stimulus. But what is it, and why our brain responds to it?

In this video Paul Andersen explains how the boundary between the system and environment is chosen to simplify analysis of a physics problem.

Is there extraterrestrial life in our solar system? Or are we alone? Take a journey to the ocean worlds on Jupiter and Saturn to investigate the possibility. -- Deep in our solar system, a new era of exploration is unfolding. Beneath...

Well, it wouldn't be too long after we started developing Ecology that we would try to control the environment. In some ways this was helpful and likely prevented a lot of people from starving. But, there have been a few downsides.

You probably know some of the signs of industrialization in the nineteenth century: Trains connected cities, symbolizing progress. But they also brought about the destruction of rural lands, divisions between social classes, and rapid...

In this passionate call to action, 16-year-old climate activist Greta Thunberg explains why, in August 2018, she walked out of school and organized a strike to raise awareness of global warming, protesting outside the Swedish parliament...

It seems like stimulants and hyperactivity shouldn't mix, so why are they so often prescribed to treat ADHD?

Activism is a tough job, especially for young people yearning for immediate change -- something climate activist Melati Wijsen has learned over ten years of pushing for environmental protection, starting at age 12 in her home on the...

With a solid understanding of biology on the small scale under our belts, it's time for the long view - for the next twelve weeks, we'll be learning how the living things that we've studied interact with and influence each other and...

How do you talk to someone who doesn't believe in climate change? Not by rehashing the same data and facts we've been discussing for years, says climate scientist Katharine Hayhoe. In this inspiring, pragmatic talk, Hayhoe shows how the...

Have you ever noticed how easy it is to get distracted while studying - even when you know you really don't have time for Facebook, Snapchat, Cookie Clicker, or whatever else is calling you? This week we're going to help you get a better...

From a special black-footed ferret to coral that can withstand warming waters, genetic rescue efforts that use genomics and synthetic biology are helping nature thrive. But despite the huge successes of this kind of intervention,...

In this video Paul Andersen explains how the climate on the earth is affected by the amount of solar radiation and the greenhouse affect. The addition of anthropogenic greenhouse gases has led to global warming which is impacting humans...

Paul Andersen explains how the central dogma of biology explains life on our planet. He starts with a brief discussion of common characteristics of all life. He then explains how DNA is used to make proteins which in turn make you. He...

Paul Andersen reviews the major components of the homeostasis. He explains how organisms respond to abiotic and biotic factors in their environment with feedback loops. He shows how responses can be behavioral or physiological.

Daniel Reisel studies the brains of criminal psychopaths (and mice). And he asks a big question: Instead of warehousing these criminals, shouldn't we be using what we know about the brain to help them rehabilitate? Put another way: If...

In this video Paul Andersen explains how the resources required for survival come from the Earth. The resources are not evenly distributed on the planet and neither are the humans. According to the NGSS we need to limit the use of...

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...