Video: Crystal clear ice forms on Lake Superior

Lake Superior froze over last week, creating an incredible phenomenon where the lake was completely clear - and several inches thick, making it possible to see to the bottom of the Great Lake.

US winter storm causes 4th day of dangerous, icy conditions

A deadly storm system lashed a large swath of the southern U.S. with bands of sleet and snow for a fourth day on Thursday, grounding more flights, leaving hundreds of thousands without power, forcing school closures and making already treacherous driving conditions worse.

Winter weather cancels flights, leads to death in Texas

Winter weather brought ice to a wide swath of the United States on Tuesday, causing the cancellation of more than 1,600 flights nationwide, bringing traffic to a standstill on an interstate through Arkansas and knocking out power to thousands of Texans.