Decimals are not trivial things. Well, they are, but they aren't. Now its all confusing. Let me rephrase. Decimals are how we count things that are less than one. For instance, in the olympics, the difference between gold and silver is often by .01 or less! You can see that decimals are important for more than just your math teacher's joy.
When Isaac Newton formulated his three laws of motion, he transformed physics because these laws allowed precise predictions of the movement of objects at all times and in all circumstances. From this, Newton deduced the law of gravity, which explained the movement of planets and stars. This program describes these theories and goes on to outline the four fundamental forces of the universe and how Einstein revolutionized the way we understand gravity with his general theory of relativity.
This short film follows a 14-year-old boy from Jamshedpur, a major industrialized city in Eastern India, during his daily routine. Amar is the main breadwinner in his family. With perseverence and determination, he works two jobs six days a week in addition to attending school in the afternoons. One of Amar's dreams is to become a cricket star.
The Antonov An-225 is one of the largest planes in the world. Here's a little perspective on what makes this thing so special. We live in an age when most airliners are powered by two or four jet engines.
This monster has six. Its wingspan measures 290 feet (88 meters). That's longer than five 53-foot semi-truck trailers set end-to-end. Its maximum total weight at takeoff is 640 tons. That's more than twice as heavy as the Statue of Liberty.
Cognitive neuroscientist Al Seckel, formerly of the California Institute of Technology, is internationally recognized as one of the world's leading authorities on visual and other sensory illusions. In a transformative talk, Seckel discusses the underlying mechanisms and frameworks of perception, and how they give rise to different systems of belief.
First, Keith Barry shows us how our brains can fool our bodies -- in a trick that works via podcast too. Then he involves the audience in some jaw-dropping (and even a bit dangerous) feats of brain magic.
Putting words back into math lessons enables even the youngest school-age minds to grasp complex concepts, such as fractions, that are traditionally thought of as abstract and difficult to understand. In his stunningly simple and effective approach, math no longer creates problems for kids but solves them.
You have probably heard people say they are just bad at math, or perhaps you yourself feel like you are not “a math person.” Not so, says Stanford mathematics education professor Jo Boaler, who shares the brain research showing that with the right teaching and messages, we can all be good at math. Not only that, our brains operate differently when we believe in ourselves. Boaler gives hope to the the mathematically fearful or challenged, shows a pathway to success, and brings into question the very basics of how our teachers approach what should be a rewarding experience for all children and adults.
Uses animation to highlight reasons for the United States upcoming metric conversion. Introduces the meter, liter, kilogram and celsius. Emphasizes prefixes and stresses the decimal nature of the metric system. Points out the benefits of conversion.
For the majority of recorded human history, units like the weight of a grain or the length of a hand weren’t exact and varied from place to place. Now, consistent measurements are such an integral part of our daily lives that it’s hard to appreciate what a major accomplishment for humanity they’ve been. Matt Anticole traces the wild history of the metric system.
It's tough to know what happened on Earth thousands of years before anyone started writing anything down. But thanks to the amazing work of anthropologists and paleontologists like those working on National Geographic's Genographic Project, we can begin to piece together the story of our ancestors. Here's how early humans spread from East Africa all around the world.