By Olga Khazan | The Atlantic
Sixty pounds is roughly the weight of four adult-sized bowling balls. Or six plastic grocery bags worth of food. Or an 8-year-old.
It is also, according to a new calculation published in the journal Surgical Technology International, the amount of force exerted on the head of an adult human who is looking down at her phone.
Kenneth Hansraj, a New York back surgeon, found this figure using a computer model of a human spine. An average human head weighs about 10 to 12 pounds, and tilting it down to check Facebook, send a text, or to Google the weight of an a human head increases the gravitational pull on said cranium.
