OCW
Meet the hydra: Masters of immortality
In 1740, naturalist Abraham Trembley found something shocking in pondwater. He couldn't tell if it was a plant or an animal, though its way of moving and consuming things seemed animal-like. But when he cut parts off or even split it in two, it regenerated, which was decidedly plant-like. So, w..
TED
Beyond the Talk: Bill McKibben on oil wars and the solar revolution
Nearly 40 years after he wrote
TED
How to clean up the world's dirtiest industry
Climate strategist Joojin Kim spent years convincing banks across South Korea to stop funding coal, and it worked. Now he's aiming that same playbook at a new target: maritime shipping, a hidden engine of the global economy — and one of the world's dirtiest industries. He breaks down how..
TED
How tech will (and won't) replace your doctor
There's more health advice available than ever before — and no easy way to tell what’s worth your time. From biotech breakthroughs to smarter cancer screening, physician Dhruv Khullar and microbiologist Zack Abbott examine what happens when science can change who we are — including the po..
TED
Everything you need to know about bird flu
While avian influenza used to infect mostly birds, in the past few years, it’s been found in over 70 mammal species, including cats, dairy cows, foxes, seals, and bears. Each new mammalian infection gives the virus more chances to drift or shift, spill over into humans, and ignite a pandemic. So, ..
TED
How to make AI companies pay your energy bill
Climate expert Ari Matusiak spends his days working to rewire America's energy system, and he has an idea: instead of tech companies building new power plants for their AI data centers, they should invest in energy-efficient upgrades to your home. He lays out how this swap could lower your powe..
TED
