Radiation fruit: How 1950s 'gamma gardens' created today's grapefruit

Radiation fruit: How 1950s'gamma gardens' created today's grapefruit But don't worry: Grapefruits can't hurt you. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. Around 1900 when this photo was taken, nearly all grapefruits were yellow. The popular Rio red grapefruit wasn't developed until 1984. Breakthroughs, discoveries, and DIY tips sent six days a week.