Is this an ominous warning to humanity? Researchers have discovered more than 20 new sinkholes in the past year alone, adding to the nearly 1,900 sites already mapped by 2021 where the ground was slowly sinking or starting to cave in. Before 2000, only a handful of sinkholes appeared each decade, but climate change and prolonged drought are blamed for the dramatic increase over the past 25 years. #turkey #sinkholes #warning #science