Whether we’re talking about tigers, trees, or tarantulas, evolution happens at the level of the population. In this episode of Crash Course Biology, we’ll find out how natural selection, gene flow, genetic drift, and other processes...

This is a love letter to water, life’s solvent, and one of the most wonderful molecules around. In this episode of Crash Course Biology, we’ll learn about how water’s polarity and hydrogen bonding help it sustain life on a larger scale....

LGBTQ+ people from around the globe gathered in Washington, D.C. Saturday to celebrate Pride Month and protest the Trump administration’s recent targeting of their community. A rally will take place Sunday against health research funding...

Duncan Keegan doesn't consider himself a poet, but this deeply beautiful talk shows otherwise. With simple grace and quiet eloquence, he celebrates family, connection and togetherness, often most called for at the hardest of times.

What if the race to save the planet is harming the people who protect it? Indigenous advocate Galina Angarova exposes the hidden cost of the green energy transition, where the demand for minerals like nickel and lithium threatens to...

There's an invisible super-pollutant heating up the planet — but it's surprisingly easy to reduce, if we try. Revealing how methane contributes (way) more in the short term to global warming than carbon dioxide, chemical engineer Daniel...

Why do wolves howl? With the help of AI, we're getting closer to an answer. Linguist and software engineer Jeffrey T. Reed shares his research on wolf sounds in the wild, revealing the surprisingly complex range of vocalizations — barks,...

Why do we find it easier to trust some concepts and ideas over others? Mathematician and TED Fellow Adam Kucharski explores the science of uncertainty, revealing how the very human need for explanation shapes trust in science, fear of...

Is space the “final frontier” — or the perfect place to revolutionize life on Earth? Space architect Ariel Ekblaw reveals how self-assembling structures could build orbiting real estate in space dedicated to solving humanity’s greatest...

Yoshua Bengio — the world's most-cited computer scientist and a "godfather" of artificial intelligence — is deadly concerned about the current trajectory of the technology. As AI models race toward full-blown agency, Bengio warns that...

Scott Loarie has a challenge for you: go outside and take a picture of a living thing. He introduces the global community of people building a living atlas of the natural world by sharing their nature photos with scientists — and shows...

Coral reefs are the most biodiverse ecosystem on the planet and the lifeblood of a thriving ocean. Yet without action, 90 percent of coral reefs could die by 2050. Fortunately, reef guardian Theresa Fyffe has a plan. Learn how her team...

Astrophysicist Lisa Kaltenegger explores the thrilling possibility of discovering life beyond Earth, highlighting how cutting-edge technology like the James Webb Space Telescope lets us analyze distant planets for signs of life in...

New tech spawns new anxieties, says scientist and philosopher Grady Booch, but we don't need to be afraid an all-powerful, unfeeling AI. Booch allays our worst (sci-fi induced) fears about superintelligent computers by explaining how...

From cosmetics to nutrition, collagen is seemingly everywhere — but we don't often discuss its ethically questionable sources, says chemical engineer Fei Luo. She delves into the groundbreaking technology that uses genetically modified...

What happens when personal grief collides with your professional life? Drawing on her experience as the CEO of a crisis management firm and a hospice chaplain, Meredith Wilson Parfet breaks down the reality of grief — at work and beyond...

Your inner voice is a powerful tool for self-reflection and planning, but it can also trap you in negative thought loops — “chatter,” as psychologist and neuroscientist Ethan Kross calls it. He shares tips for quieting the less helpful...

Feeding 10 billion people without wrecking the planet means rethinking protein, from plant-based and fermented foods to lab-grown meat that tastes like the real thing. Presenting an exciting menu of sustainable options, food futurist...

Feeling stuck on the big issues? Neuroscientist Kris De Meyer has a surprising fix. Instead of waiting for information to get you motivated, he shows how taking small actions in your personal life can rewire your brain to get unstuck....

Could the key to a sustainable food system already be growing in the world's farms? Plant scientist Giles E.D. Oldroyd explores how a special quirk of soybean plants allows them to naturally partner with networks of fungi and bacteria to...

Fighting climate change is much like long-distance running: a complex journey filled with obstacles, fast-changing conditions and the need for constant adaptation. Drawing on his own experience as an ultramarathon runner, energy expert...

Why are we using tech from 100 years ago to deliver the world's electricity? Materials scientist Jason Huang shows how we could massively upgrade the global power grid by replacing the wires in existing transmission lines with new,...

Two species of Demodex mites specifically inhabit human follicles. And not just some people’s— nearly everyone is thought to host mites. One person’s face might harbor hundreds or even thousands of individual mites. On any given day,...

Industrial manufacturers spend a huge amount of energy generating heat to make everyday materials and objects, like cement, steel, and paper. And since most companies use fossil fuels to reach these high temperatures, industrial heat...