The Astronomy Picture of the Day provides a good, brief explanation on the features observed by the Curiosity Mars rover that indicate past streamflow. (via APOD: 2012 October 2 - An Ancient Stream Bank on Mars)
Source: apod.nasa.gov
My latest AGU planetary scientist interview article was published today: Volcanism & the Thermal Evolution of Planets: An Interview with Dr. Sue Smrekar. A lot of interesting research and the proposed InSight mission is very exciting (geophysical lander to Mars). (via Volcanism & the Thermal Evolution of Planets: An Interview with Dr. Sue Smrekar)
Source: agu.org
