Articles

  • article

    Time in a block universe

    Fundamental physics says time is symmetric - so why does time move forwards for us in a block universe?
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    Why not block time?

    Is time real? Are we just puppets living out a future already written? Marina Cortês explains why she thinks time is fundamental and that we don't live in a block universe.
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    The future is time

    Marina Cortês is one of a growing number of physicists who believe time is fundamental. We ask her about the alternatives theories to the block universe, where time comes first.
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    Hunting and being hunted

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

    Time to go retro

    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.
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    The cosmic family tree

    Mapping the ancestral history of spacetime in an effort to unite quantum mechanics and general relativity.
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    Is gravity time's archer?

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