The Americas have been drifting apart from Europe and Africa at a rate of four centimeters a year, and a new study has revealed the dramatic processes at play.
In mysterious rock formations known as "unconformities," millions of years of Earth's history are missing. Now, scientists have the best idea yet as to why.
The fragment, called Mauritia, is thought to have previously been connected between what became India and Madagascar.
What shook out deep below San Francisco in the early hours of April 18, 1906, went unseen. Yet the magnitude-8 earthquake killed untold thousands of civilians (and displaced hundreds of thousands more) and left the city in flaming ruins, under short...