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An NYPD officer sits in front of a vast array of CCTV screens

Technology

Police mass face recognition in the US will net innocent people

A law enforcement database of 117 million faces - half of all US citizens – hasn’t been properly vetted and is likely biased against black people, says Hal Hodson

Analysis

Underwater view of the seabed bubbling with methane taken by a submersible, with the submersible's arm visible in the bottom right

Life

Hundreds of deep-sea vents found spewing methane off US coast

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The San Francisco Bay Area from above

Earth

Why San Francisco’s next quake could be much bigger than feared

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beaver underwater

Life

How beavers could help save the western US from a dry future

Features

Sierra Nevada

Earth

California is covering mountains with sensors to fight drought

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Security agencies collected data unlawfully, UK court rules

Technology

Security agencies collected data unlawfully, UK court rules

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UK government taken to court over failure to cut air pollution

Earth

UK government taken to court over failure to cut air pollution

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Woman holds platter of brown powder

Health

Kratom ban rethink is a hint of sanity in failed US war on drugs

Comment

Outside view of one of the purple and white driverless pods in Milton Keynes

Technology

First UK trial of driverless pods paves way for autonomous taxis

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Anderson Cooper and Martha Raddatz

Earth

US presidential candidates being let off hook on climate change

The world's most pressing problem is being all but ignored by moderators in the TV debates between Donald Trump and Hillary Clinton, says Matthew Nisbet

Comment

Humans

Why scary clowns are threatening people all around the world

Analysis

Earth

Two million urged to evacuate as hurricane Matthew approaches US

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Humans

Cutting overseas students and skilled migrants will only harm UK

Comment

Humans

Men are more violent when there are more women around

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