How our society defines years, months and weeks can seem frustratingly arbitrary. Can you bring order to our unruly calendar?
The effort to unify quantum mechanics and general relativity means reconciling totally different notions of time.
Insights about time’s arrow from a liquid crystal universe.
What insights can an LCD display give us about time's arrow?
According to our best theories of physics, the universe is a fixed block where time only appears to pass.
Bizarre quantum bonds connect distinct moments in time, suggesting that quantum links — not space-time — constitute the fundamental structure of the universe.
The irreversibility of time may be a clue as to what makes up the universe’s dark matter.
A new theory explains the seemingly irreversible arrow of time while yielding insights into entropy, quantum computers, black holes, and the past-future divide.
A radical theory predicting the existence of “time crystals” — perpetual motion objects that break the symmetry of time — is being put to the test.