Friday, January 14, 2011

Gravity- String Theory for Dummies by Andrew Zimmerman Jones

Is gravity a strong or weak force? We think it's strong, seeing it holds moons in orbit, but it's actually rather weak, as eraser-sized magnets can overcome the gravity of the entire Earth when it lifts a paper clip off the ground. Yet gravity is so prevalent because electromagnetic forces are self-neutralising; sometimes they attract, and sometimes they repel. Meanwhile, nuclear forces operate at atomic distances, whereas gravity interacts across the universe.

Wednesday, January 12, 2011

Why Chinese Mothers Are Superior by Amy Chua (WSJ)

Can a regimen of no playdates, no TV, no computer games and hours of music practice create happy kids? And what happens when they fight back?