Can YOU solve it? Royal Mint launches a fiendishly difficult code breaker challenge - and the first clues are hidden on the coins in your wallet

More from Science & Technology

• Biohacker Bryan Johnson slams popular supplements brand as nothing more than 'influencer heist' and waste of money

• Urgent warning to Gmail users as scammers exploit Google's latest email update: Delete NOW

• America's 'white gold' rush kicks off as $2.3 trillion worth of lithium is discovered

• Move aside, Moo Deng! Adorable baby pygmy slow loris is the latest internet sensation - as one enamoured fan jokes it's 'basically 50% eyeballs'

• Is THIS where aliens are hiding? NASA discovers an exoplanet 146 light-years away that's 'remarkably similar to Earth' - and it could be habitable

• Cheetos and Doritos have given your favorite chips a dye-free makeover... and the results are harrowing

• Out-of-control Chinese rocket smashes into the South Pacific Ocean - after Britain was put on red-alert over the potential of falling debris

• Life-threatening winter storm with Category 2 Hurricane-force winds to slam East Coast: 'Be prepared'

• Britain prepares emergency alert amid fears over out-of-control Chinese rocket plummeting to Earth

• Revealed: The classic office words and phrases that Gen Z no longer understand - so, do you know your 'synergy' from your 'paradigm'?

• Nuclear missile silo rattled by earthquake as US military scrambles to assess damage in Montana

• Ominous warning for humanity as insects mysteriously 'fall silent'

• NASA gives a glimpse inside Orion's cramped quarters where four astronauts will live for 10 days as they whizz around the moon - 'the smell would be intolerable!'

• Chicken or beef... or crocodile? These are the BEST meats for your health, according to a nutrition expert

• Stay indoors advisories issued for thousands across multiple US states as air fills with lung-inflaming toxins

• How popular is YOUR pet's name? Use our tool to find out - as chart reveals the most (and least!) common dog and cat names in Britain

• Almost half of Brit holidaymakers will be using VR to 'try before they fly' this year

• The picture-perfect Alpine village waging war on tourists: Italian hamlet installs barriers to stop hordes of selfie-hunting holidaymakers after fed-up locals started attacking visitors

• Climate change is killing the Winter Olympics: Temperatures in Cortina have risen by 3.6°C since the games were last held there in 1956 - with more than 3 MILLION cubic yards of fake snow now needed

• Apple slammed after internal memo about Minneapolis ICE killing leaks online