Discover Resources
Browse curated homeschool resources from the community
Why Your Phone Battery Gets Worse Over Time George Zaidan
Almost all batteries, even single-use batteries, are theoretically rechargeable. That’s because the metals and other chemicals are still there in the battery. So chemically speaking, a dead battery is actually not that different from a fresh one. Then why do batteries die in the first place? And what should you do with them once they’re spent? George Zaidan digs into the science of batteries.
The Wild World of Flesh Eating Plants Kenny Coogan
Around the world there are more than 600 plant species that supplement a regular diet of sunlight, water and soil with insects, frogs and even rats. Flies, tadpoles and beetles fall prey to the remarkable, predatory antics of carnivorous plants. What exactly are carnivorous plants and how do they trap their prey? Kenny Coogan dives into the world of these flesh-eating tricksters.
The Life Cycle of a Neutron Star David Lunney
About once every century, a massive star somewhere in our galaxy runs out of fuel. No longer able to produce sufficient energy to maintain its structure, it collapses under its own gravitational pressure and explodes in a supernova. The death of that star is the birth of a neutron star: one of the densest known objects in the universe. David Lunney explores what, exactly, a neutron star is.
How Thor Got His Hammer Scott a Mellor
Loki the mischief-maker, writhes in Thor’s iron grip. The previous night, he’d snuck up on Thor’s wife and shorn off her beautiful hair. To fix what he’d done, Loki rushes to the dwarves and tricks them into making gifts for the gods. Wanting to best their smith rivals, the dwarves make a set of golden treasures, including a hammer called Mjolnir. Scott A. Mellor traces the legend of Thor’s hammer.
Can You Solve the Multiplying Rabbits Riddle Alex Gendler
After years of experiments, you’ve finally created the pets of the future – nano-rabbits! They’re tiny, they’re fuzzy ... and they multiply faster than the eye can see. But a rival lab has sabotaged you, threatening the survival of your new friends. Can you figure out how to avert this hare-raising catastrophe? Alex Gendler shows how.
What is Schizophrenia Anees Bahji
Schizophrenia was first identified more than a century ago, but we still don’t know its exact causes. It remains one of the most misunderstood and stigmatized illnesses today. So what do we actually know about its symptoms, causes, and treatments? Anees Bahji investigates.
The Key to Media s Hidden Codes
Colors, camera angles and logos in the media can all prompt immediate associations with emotions, activities and memories. Learn to decode the intricate system of symbols that are a part of everyday life -- from advertising messages to traffic signs.
James Watson on How He Discovered Dna
Nobel laureate James Watson opens TED2005 with the frank and funny story of how he and his research partner, Francis Crick, discovered the structure of DNA.
Gary Wolf the Quantified Self
At TED@Cannes, Gary Wolf gives a 5-min intro to an intriguing new pastime: using mobile apps and always-on gadgets to track and analyze your body, mood, diet, spending -- just about everything in daily life you can measure -- in gloriously geeky detail. Journalist Gary Wolf spends his days in pursuit of the most fascinating things. As a contributing editor at Wired, he's written about technology, mushroom hunters, venture capitalists
The Meaning of Life According to Simone De Beauvoir Iseult Gillespie
At the age of 21, Simone de Beauvoir became the youngest person to take the philosophy exams at France’s most esteemed university. But as soon as she mastered the rules of philosophy, she wanted to break them. Her desire to explore the physical world to its fullest would shape her life, and eventually, inspire radical new philosophies. Iseult Gillespie explores the life of the revolutionary thinker.
Infinity According to Jorge Luis Borges Ilan Stavans
What would it be like to have a limitless memory? Can the meaning of life be found in an infinite library? Is time a labyrinth or a single moment? Jorge Luis Borges explored these questions of infinity in his many works. His body of essays, poems and stories pioneered the literary style known as magical realism— and each was just a few pages long. Ilan Stavans dives into the world of Borges.
The History of the World According to Cats Eva Maria Geigl
In ancient times, wildcats were fierce carnivorous hunters. And unlike dogs, who have undergone centuries of selective breeding, modern cats are genetically very similar to ancient cats. How did these solitary, fierce predators become our sofa sidekicks? Eva-Maria Geigl traces the domestication of the modern house cat.
What s Happening to Earth s Core Shannon Odell
A hydrogen atom is traveling high within the outermost layer of Earth’s atmosphere. This particular atom first entered the exosphere millions of years ago, but today it overcomes Earth’s gravitational pull and escapes, joining the roughly 90 tons of material that leak out of our atmosphere each day. Should we be worried about these leaks? Shannon Odell digs into our planet’s imperfect plumbing.
Can You Solve the Troll s Paradox Riddle Dan Finkel
You and your brother have discovered another realm and set off exploring the new wonderful world. Along the way, you see a troll catching creatures in an enormous net. The troll agrees to release the creatures if you can come up with a statement that is both truth and false. Can you come up with the correct sentence and force the troll to release them? Dan Finkel shows how.
Three Ways the Universe Could End Venus Keus
We know about our universe’s past: the Big Bang theory predicts that all matter, time and space began about 14 billion years ago. And we know about the present: scientists’ observations of galaxies tell us that the universe is expanding at an accelerated rate. But what about the future? Do we know how our universe is going to end? Venus Keus explores cosmologists’ three possible scenarios.
How Do Crystals Work Graham Baird
Many crystals have signature shapes— like the cascade of pointed quartz or a pile of galena cubes. Every crystal’s atoms have a defining feature: their organized, repeating pattern. The pattern isn't restricted to minerals- sand, ice, metals and DNA also have crystalline structures. So what causes them to grow into these shapes again and again? Graham Baird dives into the unique properties of crystals.
Ellen Degeneres at Tulane University Commencement 2009
Top-rated television show host and New Orleans native Ellen DeGeneres was the keynote speaker at Tulane University's 2009 Commencement. This was the graduation of the "Katrina Class" that entered in Fall 2005. Ellen was introduced by Tulane president Scott Cowen.
Richard St John Why it Pays to Work Hard
Nothing comes easy, and behind every success are hours of plain hard work. Sounds intimidating, but Richard St. John proposes a simple shift in attitude to turn mediocre into incredible.
Can We Domesticate Germs Paul Ewald
Evolutionary biologist Paul Ewald drags us into the sewer to discuss germs. Why are some more harmful than others? How could we make the harmful ones benign? Searching for answers, he examines a disgusting, fascinating case: diarrhea.