Weights Slide Uphill On a Frictionless Table

Have you ever tried to hang your coat over the corner of table? Unless it snags, it seems to always fall off. This question inspired two scientists in Chicago to do an analysis on the subject. To represent the coat, they used a string with two identical weights on each end, with the string laying […]

Growing Lettuce Year Round with a High Tunnel and Fish Poop

A group of agricultural researchers at West Virginia University wanted to find out if it was possible to grow lettuce year round using high tunnel aquaponics instead of traditional greenhouse methods. Aquaponics is a term that combines “aquaculture,” the practice of farming fish as livestock in managed bodies of water, and the term “hydroponics,” a […]