Author and geologist Gregg Braden told podcast host Joe Rogan that evidence of this ancient city was kept from the public by the US and Russia during the Cold War.

However, during the interview on Wednesday, Braden noted that emerging superpowers China and India plan to televise their findings once upcoming expeditions reach the lunar surface.

The two nations are planning to broadcast their lunar missions using live feeds from mission control and cameras on their robotic landers and rovers, streaming on national TV, social media, and official space agency apps.

China's robotic Chang'e 7 mission is set for 2026, while India's Chandrayaan-4 drone is now likely to launch in 2028, with manned missions for both set between 2030 and 2040. 

According to the scientist, who has written about the possibility of life on the moon and Mars, astronauts will discover archeological structures covered in languages that people will be able to recognize as being written by human cultures.

'The evidence suggests they're from us, from a time in our past, a cycle of civilization where we did great and beautiful things by working together until we destroyed one another through war, and that we're repeating that cycle,' Braden claimed.

Braden has previously stated in books like Deep Truth and Gaia TV's Missing Links that humans on the moon came from a long-lost Earth civilization 50,000 years ago, which developed space-faring technology before destroying itself in war.

Current scientific data, including NASA's Lunar Sample Compendium and high-resolution images taken of the moon, show no evidence of artificial structures or inscriptions on the moon.

Braden claimed that photographs from NASA's Clementine mission revealed structures on the moon with 90-degree angles, which he argued don't exist in nature and suggest they were built by an ancient civilization millennia ago.

He linked these lunar structures to similar geometric shapes in Mars' Cydonia region, like the famous 'Face on Mars' and several pyramid-shaped forms, which he believes date back 50,000 years ago based on the relative dating of rock layers by scientists.

NASA has dismissed claims that there are structures on Mars, calling strange building-like images 'natural formations.' 

As for what proof he had of this world-changing theory, Braden cited unconfirmed stories from Apollo astronauts who allegedly saw structures and writings while visiting the moon, suggesting a cover-up by NASA and Russia 50 years ago.