USC Dana and David Dornsife College of Letters, Arts and Sciences

Leap seconds have helped keep clocks synchronized with Earth’s rotation, but their time may be over – here’s why

Leap years show that humans may have an odd way of measuring time. Sometimes, timekeepers even have to add extra seconds to ...
USC Dana and David Dornsife College of Letters, Arts and Sciences

Columbus’ own writings reveal how tightly religion and conquest were intertwined from the start

Christopher Columbus' actions have been much scrutinized. Less attention has been paid to his writings, and what they reveal about his motivations.