Pandemic Lockdowns Did Cut Air Pollution—but With a Catch

Pandemic Lockdowns Did Cut Air Pollution—but With a Catch

Gupta studies air pollution in India, and like many other scientists, he’s been studying how the lockdowns have decreased emissions above urban areas.In Santiago, Chile, researchers studied urban air pollution during those same three months and compared them to the same period during the previous three years.

A Fleet of Computers Helps Settle a 90-Year-Old Math Problem

A Fleet of Computers Helps Settle a 90-Year-Old Math Problem

Keller’s conjecture, posed 90 years ago by Ott-Heinrich Keller, is a problem about covering spaces with identical tiles.Over the years, mathematicians have chipped away at the conjecture, proving it true for some dimensions and false for others.It’s easy to see that Keller’s conjecture is true in two-dimensional space.

Intel's New Chip Wizard Has a Plan to Bring Back the Magic

Intel's New Chip Wizard Has a Plan to Bring Back the Magic

It was a celebration of how exponential upgrades from the chip industry have propelled progress in technology and society over the past 50 years—and an argument that the party’s not over.“It's going to keep going,” said Jim Keller, a semiconductor rock star who joined Intel last year as senior vice president of silicon engineering, and a cohost of the event.