Accumulated ice at Mars' poles, especially the north pole, suggests that it is emerging from an ice age that ended about 400,000 years ago.
New research shows Saturn's day could be six minutes shorter than earlier estimates.
Free agent Max Scherzer signed a seven-year deal with the Washington Nationals.
The New York Yankees have acquired right-hander Nathan Eovaldi from the Marlins.
The Boston Red Sox have reportedly acquired lefty Wade Miley from the Arizona Diamondbacks.
