At http://phys.org/print347613455.html ... Mars not only has polar ice caps but has glaciers elsewhere too - in both hemispheres. These glaciers have until now been obscured by a thick layer of surface dust - but they are made up of frozen water. Eureka - water on Mars. The paper was published in Geophysical Research Letters.
At http://phys.org/print347561594.html ... the Sun is subject to seasonal variability with activity waxing and waning over a period of two years - according to a paper in Nature Communications this week.