Scroll down until you’ve come across Short time and Long time. In each, if you want to change things to the 24-hour clock, be sure the option with the 0 at the beginning. For us old-school ...

The Associated Press fanned out across Ukraine to chronicle a typical 24 hours of life just as the country was about to mark ...

Cyanobacteria, an ancient lineage of bacteria that perform photosynthesis, have been found to regulate their genes using the same physics principle used in AM radio transmission.