Calculate Soybean Populations with the Hula Hoop Method While you might think of hula hoops as a game for children they’ve found a new use—helping farmers calculate soybean populations. With no need ...

I’m walking in the Eifel Mountains in western Germany, through cathedral-like groves of oak and beech, and there’s a strange unmoored feeling of entering a fairy tale. The trees have become vibrantly ...