Exploring Mexico’s Enigmatic Underwater SinkholeSinkholes could occur in the ocean too, where they were known as blue holes. Researchers were surprised to locate the world’s second-largest blue hole in Mexico, the first in China. The massive blue sinkhole was discovered in 2021, and its findings were published in Frontiers in Marine Science. Since only 5% of our oceans had been explored, there was still so much to learn about the deep waters. This discovery excited explorers, eager to experience its depths and learn more about its formation and the life that existed there. They dug deeper to l…