Sharp Knives Reduce Onion-Induced Tears By Limiting Droplet Spray, Study Finds

In the kitchens of the whole world, a gesture as common as slicing an onion systematically triggers a well-known reaction: tears. If this phenomenon has long been attributed to an irritating sulphur molecule, science today reveals a more complex mechanics. Cutting an onion without crying depends in reality on a subtle cocktail of chemical reactions and physical dynamics, where each blow of the blade releases into the air an invisible rain of mic…

Sharp Knives Reduce Onion-Induced Tears By Limiting Droplet Spray, Study Finds

Cornell University researchers have solved a kitchen mystery by demonstrating that sharp knives produce fewer and slower-moving droplets when cutting onions compared to dull blades. The findings used high-speed cameras and particle tracking to analyze droplet formation during onion cutting at speeds...

For this week of April 19th: The solution to stop crying when you cut an onion, a new medical feat, the weather forecast for the summer of 2025, a secret of the brain to fight obesity and impressive new batteries! Good listening and good weekend![