World News Mars was at some point warm enough for liquid water to flow Mars was at some point warm enough for liquid water to flow on its surface but that warmth and water flow on the red planet were probably episodic, according to a new study. Devika Chhibber 18 Nov 2014 19:02 IST Updated On 18 Nov 2014 19:02 IST Follow Us New Update NULL Read More Subscribe to our Newsletter! Be the first to get exclusive offers and the latest news Subscribe Now Read the Next Article