While Earth’s natural history has been playing out over the last few billion years, another epic planetary saga has also been unfolding right next door.

Hank briefs us on the current status of the Mars Science Laboratory, and gives us a taste of what we can hope to see coming from it in the next few months, and during the rest of its two year mission.

Earth has some new orbiters, and while one of them is vexing many scientists, another will help us learn more about our atmosphere.

Follow Comet Siding Spring at #MarsComet



On October 19, Comet Siding Spring will pass within 88,000 miles of Mars – just one third of the distance from the Earth to the Moon! Traveling at 33 miles per second and weighing...

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cut story: "viking to mars: mcu of dr cal sagan director of plaintary sutdies talking about possible doscovery of life on mars: shot of viking land rover: ...