It's been estimated that if you could pile all HeLa cells ever grown onto a scale, they’d weigh more than 50 million metric tons—as much as a hundred Empire State Buildings.
HeLa cells have been bought and sold for trillions of dollars
HeLa cells have now lived for over 60 years and have circled the world
HeLa cells were sent to space during the first space missions to see the effect of zero gravity on cells
