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Offshore boaters sometimes encounter thousands of V. velella on the water surface. [citation needed] The small rigid sail projects into the air and catches the wind. However, Velella sails always align along the direction of the wind where the sail may act as an aerofoil, so that the animals tend to sail downwind at a small angle to the wind. [8]
Scientists discovered signs of an ocean's worth of liquid water miles below Mars' surface. The findings, based on Marsquake measurements by NASA's InSight lander, could help solve a mystery.
China's Zhurong Mars rover found strange geometric shapes below the surface, sparking curiosity and raising questions about the planet's ancient environment. A Mars Rover Discovered Bizarre ...
These were first discovered by the Mars Global Surveyor. Alternate theories for the creation of surface gullies and channels include wind erosion, [55] liquid carbon dioxide, [56] and liquid methane. [57] Observations with HiRISE show widespread activity in southern hemisphere gullies, especially in those that appear fresh.
An artist's impression of ancient Mars and its oceans based on geological data The blue region of low topography in the Martian northern hemisphere is hypothesized to be the site of a primordial ocean of liquid water. [1] The Mars ocean theory states that nearly a third of the surface of Mars was covered by an ocean of liquid water early in the ...
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There may be much more water further below the surface; the instruments aboard the Mars Odyssey are only able to study the top meter or so of soil. If all holes in the soil were filled by water, this would correspond to a global layer of water 0.5 to 1.5 km deep. [41] The Phoenix lander confirmed the initial findings of the Mars Odyssey. [42]
Mars may be drenched beneath its surface, with enough water hiding in the cracks of underground rocks to form a global ocean, new research suggests. The findings released Monday are based on ...