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Physical cheating is a boundary many couples agree on. But fuzzy boundaries around what's allowed emotionally can complicate things – and break up relationships all the same.

A floating orange ball over the famed US route has puzzled travellers for more than 100 years. And while most agree that the Hornet Spook Light exists, few agree on what causes it.

Three babies have been born after receiving the landmark treatment in the US.

The move brings President Biden closer to his campaign pledge to decriminalise recreational cannabis.

In this video I break open some vials of tritium to see if it actually in creases the local radioactivity in the area around me. I use a Geiger counter to ch...

Limitless renewable energy would offer tantalising benefits: emissions-free heating, greener fertiliser and electric transport. But overcoming the obstacles will not be easy.

Many of the enigmatic stone-carved statues are "totally charred" according to local authorities.

New film The Lost King tells the story of the unearthing of English King Richard III's remains from beneath a car park. But not everyone is happy about it, writes Neil Armstrong.

A selection of the best photos from across Africa and beyond this week.

For many, seeing the world's most famous shipwreck is a lifelong dream. And now, paying adventurers called "mission specialists" can get the chance to explore Titanic up close.

As Boogie Nights, Paul Thomas Anderson's nostalgic portrait of the "Golden Age" of adult film turns 25, what do the film and porn industries have in common, asks Rachel Pronger.

Forest fires ignited by Russian shelling have devastated Ukraine's Drevlyansky reserve.

Unlike Elon Musk's latest creation, the most useful robots, experts say, do not look human - so far.

A quiet, charming, unassuming man - and arguably the most popular leader on Earth.

Scientists brought endangered species back from the brink by simply building more ponds.

Medics working in some British hospitals face “slave-type” conditions, says a doctors’ group.

Concerned for her welfare, Ashley Wadsworth was poised to fly home to Canada when she was murdered.

Lucy Letby is described as a "constant malevolent presence" at the opening of her murder trial.

The billionaire wins China's praise for comments but Taipei says freedom is "not for sale".

Jake Finn was caught on CCTV putting down his carton of milk while trying to remove the till.

Facebook-owner Meta has revealed a new VR headset as part of its continued metaverse push.

Smashing a probe into threatening space rocks is a strategy to defend Earth, an experiment confirms.

English science-fiction writer Arthur C. Clarke discusses his plans to watch the final Apollo flight to the Moon, Apollo 17, rumours about the Bermuda Triang...

An ancient Moorish invention has been providing water to the Sierra Nevada mountains for more than 1,000 years, making life possible in one of Europe's driest regions.