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

The mystery of dark matter—unseen, pervasive, and essential in standard cosmology—has loomed over physics for decades. In new ...

The acquisition and expression of Pavlovian conditioned responding are shown to be lawfully related to objectively specifiable temporal properties of the events the animal is learning about.

Recently, scientists from institutions including the University of Science and Technology of China made a fundamental breakthrough in nuclear-spin quantum precision measurement. They developed the ...

In modern physics, gravity is no longer understood as a force pulling objects together. It is the bending of spacetime itself ...

Researchers have uncovered a cosmic clock in zircon crystals that records how long sand grains stayed at Earth’s surface.