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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.
Many of these organisms have been identified from the sea surface microlayer, which, depending on definition, extends from 100 to 1000 μm below the ocean's surface. [25] The ocean's surface has unique chemical and physical properties that may concentrate species specifically adapted to these conditions.
While never before discovered underneath the surface, these polygonal structures on Mars aren’t exactly a new discovery, as Universe Today explains.For example, NASA spotted them on the surface ...
Some areas of Mars show inverted relief, where features that were once depressions, like streams, are now above the surface. It is believed that materials like large rocks were deposited in low-lying areas. Later, wind erosion removed much of the surface layers, but left behind the more resistant deposits.
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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]
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