On January 10, 2012, a powerful 7.3 magnitude earthquake struck off the coast of northern Sumatra, Indonesia, prompting officials to issue a brief tsunami warning.
Today only 14.7% of the U.S. is covered in snow, compared to over 60% on this date last year. But though it's scarce across the lower 48, snow has pounded Alaska.
Scientists have discovered that iron oxide conducts electricity more readily under the extreme pressures and temperatures found in Earth’s deep interior.