For some reason, in the last decade, sinkholes have been appearing in the headlines more and more frequently. It could be that news outlets are just faster at reporting news, but it’s possible that mining, fracking and other human operations have been weakening the ground below us. Cars, houses and roads are being swallowed by sinkholes at an alarming rate. You may think that you’ll never encounter one of these dangerous phenomena yourself, but experts estimate that thousands of sinkholes form every year in Floridaalone. What about the rest of the United States? And the world?