Physics


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Philosophy of science
But is it science?

Theoretical physicists who say the multiverse exists set a dangerous precedent: science based on zero empirical evidence

Jim Baggott

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Quantum theory
Splitting the Universe

Hugh Everett blew up quantum mechanics with his Many-Worlds theory in the 1950s. Physics is only just catching up

Sean Carroll

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History of science
No absolute time

Two centuries before Einstein, Hume recognised that universal time, independent of an observer’s viewpoint, doesn’t exist

Matias Slavov

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Physics
The ABC of time

In our Universe, time seems to go from past to future, not in reverse. But what if time doesn’t even have a direction?

Matt Farr

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Cosmology
The cosmic now

Are you here now? Impossible to say. The idea that any group of events can truly happen at once is just an illusion

Anthony Aguirre

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Earth science and climate
Flash!

It ignited life on Earth, propelled evolution, and now signals climate change. Yet what sparks lightning remains a mystery

Sidney Perkowitz

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Physics
Seeing the quantum

The human eye is a surprisingly good photon detector. What can it spy of the line between the quantum and classical worlds?

Rebecca Holmes

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Physics
Time to update the Nobels

Science today is an intricate, collaborative, global enterprise. Nobel prizes for individual scientists are an anachronism

Brian Keating

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Physics
In defence of disorder

Humans love laws and seek predictability. But like our Universe, which thrives on entropy, we need disorder to flourish

Alan Lightman

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Philosophy of science
The blind spot

It’s tempting to think science gives a God’s-eye view of reality. But we forget the place of human experience at our peril

Adam Frank, Marcelo Gleiser & Evan Thompson

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Physics
Time after time

The question of whether time moves in a loop or a line has occupied human minds for millennia. Has physics found the answer?

Paul Halpern

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Physics
Through two doors

How a sunbeam split in two became physics’ most elegant experiment, shedding light on the underlying nature of reality

Anil Ananthaswamy

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Cosmology
Anthropic arrogance

Claims that the Universe is designed for humans raise far more troubling questions than they can possibly answer

David P Barash