Photo credit: Representative Cover Image Source: The “Door to Hell” (also known as the Gate to Hell) is a natural gas field in Derweze, Turkmenistan, that collapsed into an underground cavern in 1971, becoming a natural gas crater. (Giles Clarke/Getty Images) – Array
Photo credit: Representative Cover Image Source: A whale shark attracted by powerful lights of a scuba diving boat on December 02, 2007, Gulf of Tadjourah, Djibouti, Indian Ocean. (Photo by Alexis Rosenfeld/Getty Images) – Array