If you want to savor your avocados and guacamole without worrying they'll turn an unappealing brown, a new machine called the Natavo Zero—dubbed the "Avocado Time Machine"—is here, from Australia, to help. "It works by using steam to create pressure fluctuations that switch off the enzymes responsible for browning," Fast Co. explains. "And then they stay green, whether you opted to process them into slices, dices, or mush."
Designed to process up to 4,000 avocados an hour, the machine is clearly designed for industry (not home use). But if you're looking for a kitchen countertop-sized solution for browning avocados, there are some easy steps you can take in food prep to help keep your avocados greener, longer.