Fundamental physics says time is symmetric - so why does time move forwards for us in a block universe?

The possibility that there might be many parallel worlds has just become a little more likely.

Mathematical models predict how fast a rumour will spread and how many people it's likely to reach.

A model of the interaction between predators and prey explains why sometimes frogs appear to eat snakes.

What would happen if the Sun suddenly exploded? Einstein wondered the same thing, and completely changed our understanding of the Universe.

Mapping the ancestral history of spacetime in an effort to unite quantum mechanics and general relativity.

A new model argues the forces between particles in the early universe loosed time’s arrow, creating temporal order from chaos.

A model of backward causation in which the future affects the past could help unite quantum mechanics and general relativity – and satisfy a challenge thrown down almost a century ago by Arthur Eddington.