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Water on the red planet: Nasa reveals major discovery – in pictures

Scientists believe that flowing liquid water is almost certainly responsible for mysterious features on Mars that change with the seasons. This is Picture 19 in Viking on Mars: anniversary (a Daily Express photo gallery).

Mars is the fourth planet from the Sun. Named after the Roman god of war, and often described as the “Red Planet” due to its reddish appearance. Mars is a terrestrial planet with a thin atmosphere composed primarily of carbon dioxide. Pictures of Mars. Image Credit: David Himes, NOAA/GSD

How one man with ex-WWII army equipment turned a field into a key site in the space race. Timeshift BBC4

A montage of 32 images taken in less than a second as the International Space Station transits the Sun and a solar prominence. Credit and copyright: Thierry Legault.

New law implies thermodynamic time runs backwards inside black holes

(ScienceX)—In this new monthly series, we are offering summary articles featuring links to some of the most interesting, intriguing or popular stories that appeared on ScienceX throughout This is the September 2015 edition.