NASA launches its most ambitious hunt for traces of life on Mars, landing a car-sized rover in a rocky, ancient river delta. The rover will stow samples for possible return to Earth and test technology that may pave the way for human travel to Mars.

• GBH
• ARTE
• Craig Sechler
• Kennda Lynch
• Diana Trujillo
• Sanjeev Gupta
• Jennifer Eigenbrode
• Heather Graham
• Kenneth Farley
• Moogega Cooper