A car backfires, and your shoulders jump. A shadow moves, and your eyes fly open before your brain catches up. That dramatic flash of white sclera around widened eyes feels automatic because it is.

The roots of Russia's invasion of Ukraine go back decades and run deep. The current conflict is more than one country fighting to take over another; it is — in the words of one U.S. official — a shift ...

Pennsylvania's 160th District candidates for the state House of Representatives Democrat Elizabeth Moro (left) and incumbent Republican Craig Williams (right). (Credit: Bradford Glazier and Carl Weiss ...

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Black holes are regions in space where an enormous amount of mass is packed into a tiny volume. This creates a gravitational pull so strong that not even light can escape. They are created when giant ...