Mysterious 'doorway' spotted in NASA Mars photo sparks theories of lost civilization

More from Science & Technology

• Blind psychic Baba Vanga's chilling 2026 warnings resurface as clock ticks on three prophecies

• Trump releases new UFO footage as files expose silent 500ft triangle over US base and mysterious body with indecipherable markings

• Chilling map reveals where ground could give way beneath 6.5 million Americans... is your home at risk?

• Urgent warning to every American over police trick that secretly takes your DNA

• Artificial Armageddon? As AI designs 16 brand-new VIRUSES, scientists raise fears bots could come up with a catastrophic bioweapon

• Vets tell Brits to ditch Pugs for Jugs and Puggles: Crossbreeds have the same lovable personalities as flat-faced breeds - but a fraction of the health problems

• See the damage left behind by SpaceX on the moon: Shocking photos reveal new lunar crater carved out by one of Elon Musk's discarded rockets

• Have YOU seen a ghost? Study maps the 'uncanny' experiences we rarely talk about - and it turns out they're much more common than we thought

• Mysterious discovery near Egyptian pyramid reveals how ancient structures were really built

• Eerie 'shape-shifting orb' spotted hovering over Colorado for hours

• UFO disclosure movement's astonishing new Trump claims: Secret Oval Office meetings... Air Force One plan... and 'imminent' next move

• E-scooters are even MORE dangerous than motorbikes: Shocking figures reveal how riders are at higher risk of brain and organ injuries - yet just 6% wear a helmet

• How AI could ruin your life: From exposing affairs to leaking your private chats and medical records - why everyone should be concerned amid string of incidents where artificial intelligence goes rogue

• Singletons rejoice! Study reveals being alone is GOOD for you - because it provides a unique opportunity for personal growth

• The dodo wasn't stupid after all! Scientists debunk one of history's biggest animal myths - revealing the extinct bird was just as smart as modern pigeons

• The end of haddock and chips? Britain's fish stocks face COLLAPSE as trawlers illegally dump six times more fish than they bring ashore, scientists warn

• What is the healthiest snack? Diet experts reveal their 10 top choices that will kill hunger pangs AND keep you trim

• One of Elon Musk's discarded SpaceX rockets crashes into the MOON at 5,400mph - producing a blast equivalent to 15,000 sticks of dynamite and carving out a brand new crater

• Forget lab-grown meat! Scientists have come up with a way to cultivate beef INSIDE lettuce and tobacco plants

• Stay indoors advisories issued in six US states TODAY as wildfire carrying lung-penetrating toxins fills the air