Are you tired of shedding tears while cutting onions? Maynard Okereke explains the science behind onion tears. Onions release a gas called propanethial S-oxide when their skin is broken, which stimulates tears. He shows some effective hacks to keep your eyes dry from refrigeration to using a sharp knife and creating proper ventilation, we've got you covered. Say goodbye to onion-induced sobbing and chop like a pro!