The ring would have gradually fallen to Earth as meteorites, correlating to a spike of impacts seen in the geological record.
A ring could explain a mysterious arrangement of impact craters near the equator and might even have caused an ice age, ...
By Robin Pogrebin Once she was cast out of the United States. Today, her art and activism are front and center at an exhilarating Brooklyn Museum retrospective. By Siddhartha Mitter ...