Quantum walks sound abstract, but they sit at the center of a very concrete race: who will harness quantum mechanics to solve problems that overwhelm today’s most powerful supercomputers. Instead of ...

Donald Trump is briefly seen in a moment that, on its own, seems routine — the kind of passing image that would normally come ...

The White House unveiled plaques near the Oval Office that describe U.S. presidents with varying levels of accuracy, depending on President Trump’s opinion of them. By Chris Cameron Reporting from ...

Walking regularly can lower your systolic blood pressure. Walk three to five times per week for 20 to 40 minutes at a moderate pace to lower blood pressure. To get an accurate blood pressure reading, ...