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ANCIENT tunnels believed to be the entrance of a supposed underworld have been discovered in a centuries-old church. Archaeologists found these mysterious passageways in a Mexican city creepily ...
Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Scientists have ...
Kilometres below the ocean surface, they relentlessly belch out searing hot water rife with harsh chemicals from beneath Earth’s crust. When they were first discovered in 1977, nobody expected ...