Rivers on Mars may have flowed more recently than previously thought

This self-portrait of NASA's Curiosity Mars rover shows the vehicle on Vera Rubin Ridge in Gale crater on Mars. North is on the left and west is on the right with Gale crater's rim on the horizon of both edges. This mosaic was assembled from dozens of

Mars' Rivers Flowed Stronger and More Recently Than Previous Estimates A global survey of Mars by Edwin Kite and colleagues concludes that for a given area, the planet's rivers were wider than those on Earth today. Climate Of Ancient Mars Still A Mystery While the team unlocked new knowledge on the existence of rivers on Mars, the revelation made it more hard for scientists to figure out the climate on the Red Planet billions of years ago.

A preserved river channel on Mars appears in this photo taken by NASA's Mars Reconnaissance Orbiter, with color overlaid to indicate elevation.

Riverbeds were carved deep into the Martian surface long ago, but the understanding of the climate billions of years ago remains incomplete.

Mars may still host active groundwater deep beneath its surface, according to a new study by researchers at the University of Southern California. There were hundreds of these runoffs across the planet, particularly since Martian rivers are known to be much bigger than the ones on Earth. The lab, in Pasadena, replicated as closely as possible Mars's thin atmosphere and freezing temperatures, which reach as low as -90°C (-130°F) at night.

After closely analyzing a phenomenon known as "recurrent slope linea", estimated to be the dry signatures left by short-lived streams, scientists determined deep groundwater on Mars is likely not relegated to the poles.

It's a puzzle why ancient Mars had liquid water.

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NASA has announced that it has completed its first test flight of its drone-like helicopter which will fly to the Red Planet in 2021 to reveal a new perspective on the Martian surface.

"The need for a strong greenhouse effect is clear".

The rivers show signs of shortening over time, but they still had strong flows until the tail end of the wet period, when the climate completely dried up.

Dr Heggy said: "We propose an alternative hypothesis that they originate from a deep pressurised groundwater source which comes to the surface moving upward along ground cracks". "The wettest day of the year is still very wet". But their work, which was published online today (March 27) in the journal Science Advances, provides new details that could lead to a better understanding of the planet's climate history and life-hosting potential.

Kite said that this work infers that something in the current science of planets and the early solar system isn't right, on the grounds that everything researchers know suggests that the rivers on the Red Planet should have been small and temporary, on the off chance that they existed at all.

"Gearing up for that first flight on Mars, we have logged over 75 minutes of flying time with an engineering model, which was a close approximation of our helicopter", MiMi Aung, project manager at the Jet Propulsion Laboratory, said in a statement.

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