Scientists create an atomic clock so precise it could REDEFINE the second

More from Science & Technology

• Urgent warning to seek higher ground as New Mexico dam is feared to break during major storm

• Earthquake rocks Seattle as thousands report shaking in region feared to be overdue for major seismic event

• Giant 'wave' thousands of miles wide barrels toward US as scientists warn of 'quintuple whammy' for California

• 'Triple flood threat' triggers urgent warnings for millions as massive storm engulfs 15 US states

• Mysterious orb caught soaring over Los Angeles during live TV report

• The first face of mankind? Ancient human who lived 315,000 years ago is brought back to life in stunning digital reconstruction

• The Matterhorn is snow-free: Shocking images reveal how the mountain - famously featured on Toblerone packaging - is bare amid autumn heat

• iPhone 18 Pro buyers claim Apple's £1,199 smartphone is changing COLOUR - just weeks after going on sale

• iPhone 18 Pro goes on sale around the world: Huge queues form outside Apple Stores in Kuala Lumpur, Sydney and Singapore - while scalpers set their sights on shoppers in Hangzhou

• End-of-life doctor reveals the haunting sign death may be days away

• Eating two slices of deli meat a day linked to 52% higher risk of dementia, study finds

• Mysterious 'UFO' spotted on SpaceX livestream sparks wild alien theories: 'Looks like a mothership'

• Massive SpaceX rocket explodes in a fireball as it hits ocean following test flight

• Earth's cities are changing COLOUR: Astronaut photos taken just 13 years apart reveal how night lights have morphed from yellow to white across the globe

• And you thought the iPhone Duo was expensive! 'Liquid metal' version of Apple's foldable goes on sale for $21,000

• Say goodbye to brown bananas! Gene-edited fruits could soon be sold in UK supermarkets

• You can swim, but you can't hide! Sharks can hear sounds nearly 250ft away - and hunt down the source, study finds

• Elon Musk claims he sleeps with a pile of BOOKS under his head to 'help with digestion' - but does it really work?

• Meet Casper, the one-in-100 million 'ghost' lobster! Incredibly rare crustacean is bright white thanks to rare genetic mutation

• Your next parcel could be delivered by a two-legged robot: Evri starts using bots that can zip along at 4mph - and can even walk up stairs