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The allegation comes after both Nord Stream undersea gas pipelines sprang a leak on Monday.

Magnus Carlsen claims Hans Niemann has "cheated more than he has publicly admitted", but offers no evidence.

The former US intelligence contractor leaked a vast US intelligence surveillance programme in 2013.

Hilaree Nelson appeared to fall into a 2,000ft gap in the ice descending the world's eighth tallest peak.

The same technique could be used to deflect space rocks that threaten Earth.

Long before the Rosetta Stone was deciphered, Arabic scholars had made their own breakthroughs with Egyptian hieroglyphs, writes Daisy Dunn.

The Dart mission will test a technique for defending the Earth against hazardous space rocks.

The ancient city of Great Zimbabwe was an engineering wonder. But archaeologists credited it to Phoenicians, Babylonians, Arabians – anyone but the Africans who actually built it.

The minister is under tighter police surveillance after a "serious threat", federal prosecutors say.

Double Olympic marathon champion Eliud Kipchoge breaks his own record for the men's marathon at Sunday's race in Berlin.

Magnus Carlsen's apparent accusation against Hans Niemann is the biggest chess scandal in years.

It's filled with artefacts that have shaped history - but its doors are firmly shut to the public.

The 24-year-old also plotted to kill Canadian PM Justin Trudeau, prosecutors told a Canadian court.

The video was released a day after authorities had earlier announced extensions to Covid restrictions.

The largest diamonds to feature in King Charles III's coronation may be pieces of the ancient ocean floor, which drifted down into the interior of our planet – then came back up.

US regulators said the firm and its former boss misled investors following two fatal crashes.

One man injected with the modified cold sore virus saw his tumour completely disappear.

A new survey from the tech giant suggests workers and bosses disagree about productivity.

A crash involving five semi-trailers caused thousands of cans of beer to spill across the road.

When faced with a choice, Vladimir Putin always seems to choose escalation, writes the BBC's Russia editor.

Along with three of his children, the ex-president is accused of lying to "unjustly enrich himself".

An American teenager’s victory against the world champion has sent chess into uproar. We answer the key questions

Natural disasters have spurred some communities and homeowners to generate their own electricity.

The traces found in jugs in Israel could have been used as a send-off for the dead 3,400 years ago.

The Perseverance robot is close to completing its first set of objectives on Mars.