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ABC building blocks

Easy as ABC?

Mathematicians are working hard to understand an impenetrable proof of the famous ABC conjecture.
Article

What is a block universe?

Has the future already already been written? Is time just an illusion? Take a step outside of spacetime with cosmologist Marina Cortês to discover the block universe.
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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.
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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.