This Week: Holy horseradish! Ancient roots of pain
In the News: Mass killings explained?
If you were to draw lines representing your social connections to all your friends, your friends’ friends, and your friends’ friends’ friends, what would it look like? For Jeffrey Heer of the University of California, Berkeley, it looks like a big blue ball of glittery fuzz.
In this image, Heer is represented at the center [...]