The mysterious discovery of massive underground tunnels in Brazil and Argentina has challenged long-held assumptions about prehistoric environments. These sprawling burrows, first spotted by Heinrich Frank, a professor of geology, are far too vast and complex to have been created by natural geological processes or early human activity. According to a 2018 study published in Science Advances, the leading theory …
Read More »Scientists Unearth Giant Underground Tunnels—And They Weren’t Built By Humans Or Nature
