Perhaps the main difference if the earth were a cube would be that students would become much more frustrated trying to calculate the gravitational field. For a uniform cube with side length L and density rho, the gravitational force on mass m at position (x,y,z) is given by »
The crushed stones you see alongside railroad tracks are what is known as ballast. Their purpose is to hold the wooden cross ties in place, which in turn hold the rails in place. »
We dished our fair share of smack talk towards Ashton Kutcher
Quora bills itself as nothing less than "your best source of knowledge"—not your dad, not your librarian, not Wikipedia. The company, spawned by two righteous Facebook alumni (one since ousted), has raised tens of millions from investors who think it can back this claim up. But a little poking around shows Quora's got a… »
Quora, the excellent Q&A site, just released an iPhone app that makes it dead easy to get your questions answered and learn new things. If you ever used Quora, you know how smart their community can get. »
When Digg founder Kevin Rose tweeted about the existence of "Google Me,"