This puzzle is known as the problem of time, and it remains one of the most persistent obstacles to a unified theory of ...

The National Reconnaissance Office has now declassified a satellite program used to spy on America’s adversaries ...

Some 150 million years ago sauropods dramatically shaped the dinosaur ecosystem in what is now the western U.S., according to a new study ...

In the latest bout of winter weather, a bomb cyclone could bring blizzard conditions to the Carolinas while freezing ...

A century ago, Erwin Schrödinger came up with an equation that says how the quantum world behaves. Now scientists are asking ...

Icy days aren’t the time to multitask while walking, either, so tuck your phone away and keep your hands free. Murza also ...

After evacuating four astronauts from the ISS last month, NASA is looking ahead to its next crewed mission to the space ...

A warmer atmosphere can hold more moisture, and that’s why last weekend’s winter storm dumped more snow, sleet and freezing ...

An exoplanet called HD 137010 b might be the closest thing astronomers have ever seen to “Earth 2.0.” The trouble is that ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific ...

Synchrotron radiation has revealed a star map made by the ancient astronomer Hipparchus that was thought to be lost to time ...

A new analysis suggests that genes play a much larger role in human longevity than previously believed. But lifestyle factors ...