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Our journalists and guest bloggers bring you stunning imagery and the space stories that matter most.

Unraveling a Martian enigma: The hidden rivers of Arabia Terra

Joel Davis • March 21, 2017

Arabia Terra has always been a bit of a martian enigma. Planetary scientist Joel Davis takes us on a tour of its valley networks and their significance in telling the story of water on Mars.

NASA's Mars Announcement: Present-day transient flows of briny water on steep slopes

Emily Lakdawalla • September 28, 2015 • 25

NASA held a press briefing today to publicize a cool incremental result in the story of present-day liquid water on Mars. How big a deal is this story? Was all the pre-announcement hype justified? Is this just NASA discovering water on Mars for the zillionth time? What does this mean for things many space fans care about: life on Mars or future human exploration?

What’s Seeping on Mars? Recurring Slope Lineae

Matthew Chojnacki • May 13, 2014 • 13

HiRISE team member Matt Chojnacki tells us about the discovery and formation of these mysterious features forming on Mars in the present day.

LPSC 2014: Titan's Land of Lakes

Emily Lakdawalla • March 31, 2014 • 2

Report from a varied session on Titan's lakes at this year's Lunar and Planetary Science Conference.

PLANETARY RADIO LIVE: MAVEN Launches for Mars

Mat Kaplan • November 01, 2013 • 2

Host Mat Kaplan will be joined by Bill Nye the Science Guy, Bruce Betts and Emily Lakdawalla for this special live event.

America's Pastime: Planetary Science

Mat Kaplan • October 15, 2013

Apologies to baseball fans and others for the theme of this week's Planetary Radio preview, which has star player Emily Lakdawalla on deck.

DPS 2013: Tidbits from Titan

Emily Lakdawalla • October 09, 2013 • 8

I attended a few talks at the Division for Planetary Sciences meeting today that concerned Titan's origin and interesting surface, and then one in the afternoon about the atmosphere.

Mars' valley networks tell us of a dry, then wet, then dry Mars

Emily Lakdawalla • September 10, 2013 • 1

Was there rainfall on Mars? Recent work mapping valley networks suggests there probably was -- but only for about 200 million years. What does this mean for life, and the Curiosity mission?

Caution: Spacecraft Under Construction

Mat Kaplan • August 20, 2013 • 1

Join Emily Lakdawalla and Mat Kaplan inside JPL's High Bay 1, where two Earth-revealing missions are being readied for launch.

The Ancient Snows of Mars on Planetary Radio

Mat Kaplan • August 06, 2013

Kat Scanlon tells Planetary Radio that Hawaii and Mars have more in common than you might think.

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