“Agricomb” is the perfect tool for measuring gases from cow burps

Enlarge / It’s a myth that cows fart methane; they actually burp out the greenhouse gas. Agriculture now has a new tool for measuring that methane, which could help design cleaner and more productive farms. (credit: BerndBrueggemann/iStock/Getty Images) Optical frequency combs are essentially high-tech “rulers” for measuring different colors of light; they’re useful for making […]