Interesting list from Alan Boyle. My favorites:
Mount Baldy Sinkholes – “The dune may cover trees, which rot away to create the holes. The dune was once mined to use the sand in glass making, so the phenomenon may be caused by humans.”
The Permian Extinction – “The most intense extinction in Earth’s history was the End-Permian mass extinction. An estimated 93–97 percent of species on the planet were wiped out. The cause of the extinction is one of the biggest debates in paleontology.”
Messinian Salinity Crisis – “Around six million years ago, the Mediterranean Sea turned into a desert. It stayed that way for around 630,000 years, an era now known as the Messinian Salinity Crisis. Scientists agree that it was almost certainly because the sea became blocked from the Atlantic. The mystery is why, and there’s no shortage of theories.”
Verizon’s New York Wireless Mystery – “Remember when Verizon lambasted AT&T for crummy cell phone service in New York? Who’s laughing now? It’s a mystery why Verizon service is so poor in Manhattan.
Alright, that last one came from me.