Deadline for missing scientists probe nears as congressman warns of sinister plot unfolding
A US congressman has revealed a chilling theory about what may be happening to scientists and nuclear officials who have gone missing or died in recent years.
You're washing your clothes WRONG! Experts reveal how often you need to clean your jeans - and it turns out 79% of Brits are overdoing it
Experts from AO.com have revealed exactly how often common items need to be cleaned - including jeans.
Small boat gang rapist launched sex attack with two other gang rapists on Brighton Beach after he was turned down for asylum
Karin Al-Danasurt (seated), Ibrahim Alshafe (right) and Abdulla Ahmadi (centre) gang-raped a woman on Brighton beach. Their asylum claims had each been turned down by the time they struck.
Britain and France should lead new European NATO without help from the US, says ex-chief
Anders Fogh Rasmussen, the organisation's secretary-general from 2009 to 2014, said a new security architecture was needed after Donald Trump threatened to withdraw from Nato.
Group fears new charge could be 'death sentence' for Essex libraries
Angry campaigners claim the new charge is 'unfair'
Off the tracks! Public transport 'crime wave' fears as robbery soars by 136% and sexual offences 17% since before Covid
Data from the House of Commons Library showed there were 1,663 cases of robbery recorded by British Transport Police in 2024/25 - up from 705 in 2018/19.
Revealed: The monster father who raped Nick Knowles's wife Katie for years... and her dark struggle to process and understand the man who stole her childhood
The business owner and influencer (pictured), 35, who married veteran TV presenter Nick last year, astonished friends and followers by opening up about the sustained sexual abuse she had suffered.
Beyonce and husband Jay Z 'set to splash out on a lavish 16th century French chateau after scrapping plans to relocate to the UK'
Beyonce and husband Jay Z are reportedly eyeing up a lavish 16th century chateau in the French wine region of Bordeaux.
Three young brothers vanished on Thanksgiving 2010... now investigators believe they have made a tragic break in the case
Memphis police discovered the unidentified remains of three children, believed to be between three and seven years of age, in a wooded area earlier this month.
BEL MOONEY: My stepdad abused me at 17... but it's Mum I can't forgive
When I reached 17, my stepdad started to dance smoochily with me, saying: 'I'm teaching you how to dance like men will dance with you, one reader writes.
Update in Gallows Corner closure after another delay
Essex & Suffolk Water has issued an update
Cruz Beckham, 21, wraps his arm around girlfriend Jackie Apostel, 30, as they enjoy a shopping trip in NYC
The singer, 21, and his singer girlfriend, 30, were spotted buying movie and TV scripts, one of which also included a Friends book.
Awkward kiss cam encounters! Getting attacked by a mascot and the most painful rejection feature among hilarious clips
In one viral clip, a woman shuts down her friend mid-rant at an NBA game, while elsewhere a HR boss and her married CEO were caught cuddling on a giant screen.
'He's in constant fear his past will come back to haunt him': KATIE HIND reveals what's REALLY behind the reinvention of Chris Evans - and the age gap romance, disgusting sexual 'prank' and ditching of A-list friends that could torpedo him for good
His neighbours in the well-heeled town of Marlow quite simply adore him. Described as 'polite and very, very kind', Chris Evans is nothing short of a local hero.
'SHE ruined MY wedding first!': Sister-in-law who doused bride with black paint breaks silence - as exclusive chaotic footage of real-life soap opera that has gripped nation is finally revealed
We can all imagine the bride's excited anticipation: Gemma Monk had waited almost 20 years to marry her childhood sweetheart Ken.
ITV accused of 'good editing' to 'protect golden boy' Adam Thomas after Jimmy Bullard blew up at Ant McPartlin - after I'm A Celeb all-stars final descended into utter chaos
Reality TV has often proved a must-see for intrigued viewers this millennium - yet the latest I'm A Celebrity finale has explosively upped the ante.
Essex estuary walk named in top 10 for 'loveliest views' in UK
The walk along the Colne Estuary in Colchester has been named among the best in the UK by The Telegraph.
The Essex pub with ‘to die for’ dishes and a unique view
It is the perfect place for a drink on a sunny day
Physicists Revive 1990s Laser Concept To Propose a Next-Generation Atomic Clock
Physicists have proposed a new kind of atomic clock based on a revived superradiant laser concept that could produce an extraordinarily stable signal with a linewidth around 100 microhertz, potentially the narrowest ever for an optical laser. "The implications of this result could stretch well beyond timekeeping," reports Phys.org. "A laser immune to environmental frequency shifts would be a powerful tool in optical interferometry -- using interference patterns in light to make ultra-precise measurements." From the report: In a conventional laser, a mirrored cavity bounces light back and forth between atoms, building up a bright, coherent beam. A superradiant laser works differently: rather than relying on the cavity to maintain coherence, the atoms themselves act as single coordinated emitters, collectively synchronizing their light emission. Following early theoretical ideas emerged in the 1990s, the concept didn't gain concrete traction until 2008, when researchers at the University of Colorado proposed that superradiant lasers could serve as a new kind of atomic clock.
Atomic clocks work by using laser light to probe a very precise transition in an atom, causing electrons to transition between energy levels at an extraordinarily stable frequency. Because a superradiant laser stores its coherence in the atoms rather than the cavity, its output frequency is far less vulnerable to environmental disturbances like vibrations or temperature fluctuations. Yet although this concept was first demonstrated experimentally in 2012 in a pulsed regime, the influence of heating has so far held superradiant lasers back from their full potential. To keep the laser running continuously as an atomic clock requires, atoms must be constantly replenished with energy. Doing this atom-by-atom delivers random kicks that heat the atomic sample and disrupt the lasing process, confining it to brief pulses rather than a steady beam.
In their study, Reilly's team considered whether a modification to earlier theoretical concepts could make a continuous laser suitable for an atomic clock. In almost all previous studies, atoms were treated as simple two-level systems: an electron sitting in a ground state, occasionally jumping up to an excited state and back again. The team proposed that the heating problem could be solved by adding one extra ground state to the picture. In a two-level system, if both the pumping (re-energizing) and decay processes happen collectively through the cavity, the mathematics constrains the system in a way that prevents stable, continuous lasing. But with three levels available, pumping and decay can operate on entirely separate transitions, breaking that constraint and allowing the collective approach to work. The findings have been published in the journal Physical Review Letters.
Read more of this story at Slashdot.
Essex estuary walk named in top 10 for 'loveliest views' in UK
The walk along the Colne Estuary in Colchester has been named among the best in the UK by The Telegraph.