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Hendrix, Cobain and Page. They can all shred, but how exactly do the iconic contraptions in their hands produce notes, rhythm, melody and music. When you pluck a guitar string, you create a vibration called a standing wave. Some points on the string, called nodes, don’t move at all, while other points, anti-nodes, oscillate back …
Tens of millions of years ago, a force of nature set two giant masses on an unavoidable collision course that would change the face of the Earth and spell life or death for thousands of species. The force of nature was plate tectonics, and the bodies were North and South America. And even though they …
What happens when continents collide? – Juan D. Carrillo 더 보기 »
So, you’re thinking of moving to Mars. Have you picked out a spot for your new home? No? Well, I’m here to help. First things first, here are some of the things you’ll need to bring to The Red Planet: a high tolerance for cold, loneliness, and radiation; a lifetime supply of breathable air and …
What do Charles Darwin, Michael Jordan, and Yoda have in common? They, like many other historical and fictive individuals, are bald, in some cases by their own choice. For centuries, a shining dome has been a symbol of intelligence, but despite this, many balding people still wish their hair would return. Scientists have long pondered, …
In 1985, three researchers on a dolphin-studying expedition got a little bored. To lighten things up, one pretended to be Poseidon by placing a seaweed garland on his head and then throwing it into the ocean. Moments later, a dolphin surfaced with the seaweed crowning her head. Sure, this could have been a coincidence, but …
All animals communicate. Crabs wave their claws at each other to signal that they’re healthy and ready to mate. Cuttlefish use pigmented skin cells called chromatophores to create patterns on their skin that act as camouflage or warnings to rivals. Honeybees perform complex dances to let other bees know the location and quality of a …
This may look like a neatly arranged stack of numbers, but it’s actually a mathematical treasure trove. Indian mathematicians called it the Staircase of Mount Meru. In Iran, it’s the Khayyam Triangle. And in China, it’s Yang Hui’s Triangle. To much of the Western world, it’s known as Pascal’s Triangle after French mathematician Blaise Pascal, …
The mathematical secrets of Pascal’s triangle – Wajdi Mohamed Ratemi 더 보기 »
A 13,000 mile dragon of earth and stone winds its way through the countryside of China with a history almost as long and serpentine as the structure. The Great Wall began as multiple walls of rammed earth built by individual feudal states during the Chunqiu period to protect against nomadic raiders north of China and …
What makes the Great Wall of China so extraordinary – Megan Campisi and Pen-Pen Chen 더 보기 »
The DNA in just one of your cells gets damaged tens of thousands of times per day. Multiply that by your body’s hundred trillion or so cells, and you’ve got a quintillion DNA errors everyday. And because DNA provides the blueprint for the proteins your cells need to function, damage causes serious problems, such as …
What happens when your DNA is damaged? – Monica Menesini 더 보기 »
Think back to a really vivid memory. Got it? Okay, now try to remember what you had for lunch three weeks ago. That second memory probably isn’t as strong, but why not? Why do we remember some things, and not others? And why do memories eventually fade? Let’s look at how memories form in the …
How memories form and how we lose them – Catharine Young 더 보기 »
