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New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine.

The kilogram is dead. Long live the kilogram

Video

The kilogram is dead. Long live the kilogram

For decades, the kilogram has been defined by a lump of metal in Paris. It’s time for a makeover, say Ian Robinson and Perdi Williams of the UK’s National Physical Laboratory.

Video

Stephen Fairhurst: Gravitational wave hunting

Video

Stephen Fairhurst: Gravitational wave hunting

Video

LIGO's detectors

Physics

Exclusive: Grave doubts over LIGO's discovery of gravitational waves

Features

Strange lines form a pattern

Physics

There is a weird new state of matter that can't be stirred or pushed

News

An explosion in space

Physics

The Higgs boson may have stopped the early universe from collapsing

News

Ivette Fuentes: How to build a quantum teleporter

Video

Ivette Fuentes: How to build a quantum teleporter

Video

Physics

Nobel laureates sign letter expressing Brexit concerns

News

crystal sculptures

Physics

Dawns, Mine, Crystal review – art with a crafty message for science

Culture

Sean Carroll: The many worlds of quantum mechanics

Video

Sean Carroll: The many worlds of quantum mechanics

Video

Melissa Uchida: Neutrinos, the tiny particles with huge implications

Video

Melissa Uchida: Neutrinos, the tiny particles with huge implications

Neutrinos barely interact with anything – a billion pass through your thumbnail every second. But studying these ghosts could transform our understanding of reality, as high energy physicist Melissa Uchida explains

Video

Life

2019 Breakthrough Prize winners set to receive share in $22 million

News

Video

The legacy of Stephen Hawking

Video

Physics

Gravitational waves from black hole pairs could act like tractor beams

News

Physics

Stephen Hawking, my father: "Harry Potter has magic, we have science"

Features