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The Planets: Mars


OPPORTUNITY EXPLORES FOR 14 YEARS
DISCOVERS EVIDENCE OF ANCIENT FLOWING WATER
NARRATOR: Over 50 years of Mars exploration has revealed intriguing clues, suggesting Mars has a surprisingly watery past.
ASHWIN VASAVADA: There’s a lot of evidence for ancient flowing water on Mars. For one thing, there’s a lot of rivers that once coursed across the surface that are now dry, today. There’s also evidence for floods that catastrophically scoured the surface.
JOHN GROTZINGER: It’s undeniable that the early history of Mars was much wetter than it is today.
STEVE SQUYRES: The surface of Mars is littered with an uncountable number of little round things. These “blueberries,” as we nicknamed them, are what geologists call “concretions.” ....

United States , Caspian Sea , Oceans General , San Diego , Nicola Cook , Richard Addis , Echus Chasma , Evih Efue , Cory Allen , Jennifer Welsh , Laurie Cahalane , Don Komarechka , Maggie Oakley , Arctic Ocean , Bruce Jakosky , Zachary Quinto , Pamela Rosenstein , Lauren Miller , Graeme Dawson , Leslie Tamppari , John Luker , Angelica Coleman , Stephenr Lewis , Caitlin Saks , Jake Schaefer , Rob Harvey ,

As new probes reach Mars, here's what we know so far from trips to the red planet


Perseverance will be the fifth rover to arrive on Mars that’s capable of venturing across the surface of another planet.
These amazing laboratories on wheels have extended our knowledge of a faraway world. Here’s what they’ve told us so far.
The first rover - Sojourner
Twenty years after Viking 1 & 2 landed stationary probes on Mars, a third spacecraft finally reached the planet, but this one could move.
On July 4, 1997, NASA’s Pathfinder literally bounced onto the Martian surface, safely enclosed in a giant set of airbags. Once stable, the lander released the Sojourner rover.
See the Sojourner probe from Pathfinder’s viewpoint. ....

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