Content about “
entropy
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Article

String theory: Convincing mathematics

Find out how a theory from physics has provided tools for solving long-standing problems in number theory. And in turn how number theory helps solve the mystery of black holes.

Article

Time in a block universe

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

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.
Article

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.
Article

Information is surprise

If I tell you something you already know, then that's not very informative. So perhaps information should be measured in terms of unexpectedness, or surprise?

Article

Information is bits

Computers represent information using bits — that's 0s and 1s. It turns out that Claude Shannon's entropy, a measure of information invented long before computers became mainstream, measures the minimal number of bits you need to encode a piece of information.
Collection

Can you measure information?

Can you measure information? It's a tricky question — but people have tried and come up with very interesting ideas.
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