The US was first in many fields, including powered flight and nuclear weapons. The US was the first to apply nuclear power to ...

Cosmology’s neat story of a universe driven apart by a simple, invisible “cosmic fuel” is starting to fray. A growing body of ...

For instance, one of the biggest puzzles in physics is the black hole information paradox. In the 1970s, Stephen Hawking ...

Dear Bel, I live alone - divorced over 30 years ago with no children - and feel greatly bothered by something that happened ...