once_a_student

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The End of the Universe as We Know It

What if the world around us is just a shadow of reality? Imagine, for example, that you wake up one cold winter morning and look out your window to find that the view is completely obscured by beautiful ice crystals, forming strange patterns on the glass. You might see something like the image …

Will Computers Redefine the Roots of Math?

When a legendary mathematician found a mistake in his own work, he embarked on a computer-aided quest to eliminate human error. To succeed, he has to …

Mathematics

Physicists Might Have Found a Way to Break The Second Law of Thermodynamics

Wha??<p>The laws of thermodynamics are some of the most important principles in modern physics, because they define how three fundamental physical …

Experience the "Brutal Faith" of Gottfried Böhm's Pilgrimage Church in Neviges

<i>This exclusive photo essay by Laurian Ghinitoiu was originally commissioned for the fifth issue of</i> LOBBY<i>. Available later this month, the latest</i> …

The Shadow Doctors

The underground race to spread medical knowledge as the Syrian regime erases it.<p>On a recent Tuesday evening in London, the surgeon David Nott attended a dinner at Bluebird, an upscale Chelsea restaurant. The room was packed with doctors, renowned specialists who had come for the annual consultants’ …

Earth - It took centuries, but we now know the size of the Universe

"Let us go rambling about the Universe." This is the invitation that American astronomer Harlow Shapley gave to an audience in Washington DC in 1920. He was taking part in the so-called Great Debate with fellow scientist Heber Curtis on the scale of the Universe.<p>Shapley believed that our Milky Way …

Kahoot Adds a Team Mode

This week Kahoot, the wildly popular quiz game platform, released a new team mode. The new team mode is designed to be used with students who are …

How to Unflip the Flipped Classroom

In this edition of the Hack Learning Podcast, Mark Barnes is unflipping the popular flipped classroom. Listen to what Mark says about the flipped …

Education Technology

Customizing the toolbar in your Mac Finder window

If you own a Mac, you most likely use the Finder window on a daily basis; probably more than you even realize. But one thing you may not have known …

Tutorials

A controversial theory may explain the real reason humans have allergies

For me, it was hornets.<p>One summer afternoon when I was 12, I ran into an overgrown field near a friend’s house and kicked a hornet nest the size of a football. An angry squadron of insects clamped onto my leg; their stings felt like scorching needles. I swatted the hornets away and ran for help, …

Immunotherapy

How Intel missed the iPhone revolution

Intel just laid off 12,000 workers in face of declining PC revenues, and the move has all of us asking “what’s next?” for the company that launched the microprocessor revolution.<p>The booming smartphone market is almost exclusively based on microprocessor technology from tiny ARM, a British chip …

Computer Science

Why can’t the world’s greatest minds solve the mystery of consciousness?

Philosophers and scientists have been at war for decades over the question of what makes human beings more than complex robots<p>One spring morning in Tucson, Arizona, in 1994, an unknown philosopher named David Chalmers got up to give a talk on consciousness, by which he meant the feeling of being …

Consciousness

Erasing Bad Memories May Soon Be Possible

Memories are a complex combination of objective information—the color of a car, the size of a building—and less tangible emotional feelings, like …

天空部落 TIAN

Louis Kahn: the brick whisperer

Louis Kahn used to tell his students: if you are ever stuck for inspiration, ask your materials for advice. "You say to a brick, 'What do you want, …

Diagram of probability distribution relationships

Probability distributions have a surprising number inter-connections. A dashed line in the chart below indicates an approximate (limit) relationship …

Mathematics

John Conway's Rational Tangles

John Conway has brought many new mathematical recreations to the general public. Martin Gardner wrote about him quite often in his <i>Scientific American</i> …

How did Euler prove the Mersenne number $2^{31}-1$ is a prime so early in history?

I read that Euler proved $2^{31} -1$ is prime. What techniques did he use to prove this so early on in history? Isn't very large number stuff done …