Greg Johnson

Greg Johnson

Managing Editor

Snow removal at Penn

On average, the City of Philadelphia receives about 20 inches of snow a year, according to the National Climate Data Center.

Greg Johnson

Working like a dog

Because a dog’s sense of smell is a thousand times more sensitive than a human’s, canines are regularly used to detect bombs and other explosives. They sniff out illegal drugs and endangered plants, and they can use their snouts to reveal ailments such as cancer, diabetes and seizures.

Greg Johnson

Teaching computers how to learn

The goal of machine learning is to make a computer learn just like a baby—it should get better at tasks with experience. In fact, computers best humans at tasks like chess and numerical calculations.

Greg Johnson