How easy to impress are we, when art is involved? Recently, a study shown that, at classical music competitions, judges seem to evalu...

Is this a Magnetic Perpetuum Mobile? The law of conservation of energy forbids perpetual motion. On the other hand, the small mag...

Scott Aaronson recently uploaded a mind-boggling paper, full of challenging ideas regarding free-will, quantum mechanics and computing, phi...

Recently, a new paper by Maldacena and Susskind appears, named Cool horizons for entangled black holes ( arxiv:1306.0533 ). In the paper, ...

Joseph O'Rourke proposed a beautiful problem on Math Overflow : Let every point of $\mathbb Z^2$ be surrounded by a mirrored disk o...