Last year, the Martian rover Spirit became stuck in loose sand. This prevented the rover from driving to a favorable sun-facing slope for its fourth Martian winter, which runs from May to November. The low angle of sunlight during the long winter limits the power generated from the rover's solar panels. (Yesterday)

Fourteen Nobel laureates have signed a letter supporting President Obama's proposed strategy for the National Aeronautics and Space Administration and criticizing a NASA authorization bill under consideration in the House of Representatives. (09/01/2010)

Scientists at Rice University and Hewlett-Packard are reporting this week that they can overcome a fundamental barrier to the continued rapid miniaturization of computer memory that has been the basis for the consumer electronics revolution. (09/01/2010)

Carnegie Mellon University plans to turn its research prototypes into marketplace products with the creation of Carnegie Robotics LLC, a spinoff of the university's National Robotics Engineering Center in Lawrenceville. (08/31/2010)

The number of children going to the emergency room for concussions they suffered while playing competitive sports has more than doubled in recent years, which some say may be due in part to a growing awareness of the brain injury. (08/31/2010)