Deaths may signal change in how the country’s theocratic leaders will deal with widening demonstrations outside Tehran ...

Almost exactly 200 years ago, French physicist Sadi Carnot determined the maximum efficiency of heat engines. The Carnot ...

Companies like Kairos Power are building new types of reactors with the encouragement of the Trump administration, but their ...

Try as they might, scientists can’t truly rid a space or an object of its energy. But what “zero-point energy” really means ...

Scientists have uncovered an unexpected breakdown of nuclear order in a remarkably symmetric atom, challenging long-standing ...