This summer, at a gathering at the University of Michigan,assembled a Top Ten list of unsolved physics problems. NPR's DavidKestenbaum, with the help of two physicists, lays out these questions.
The Canadian province is permanently ending the biannual time shifts for more light at the day's end. But research shows daylight saving increases health risks.
The premier of the Canadian province of British Columbia, David Eby, explains why this Sunday is the beginning of a new era of permanent daylight saving time there.