Is there life on Mars? Maybe, and it could have dropped its teddy
Yogi, Paddington and Winnie the Pooh, move over. There's a new bear in town. Or on Mars, anyway.
Yogi, Paddington and Winnie the Pooh, move over. There's a new bear in town. Or on Mars, anyway.
Planetary Sciences
Jan 31, 2023
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Engineers have employed "electrospinning," a new technique of manufacturing nanomaterials, to produce a novel fabric that offers high performance protection against electromagnetic interference, a phenomenon that can result ...
Nanomaterials
Jan 30, 2023
1
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War, budget cuts, a pandemic and a crash: For all its trials, Europe's ExoMars mission might be more deserving of the name Perseverance than NASA's Martian rover.
Space Exploration
Feb 3, 2023
0
68
Sometimes, the most complex problems can be solved with the simplest approaches. Such was the case for researchers at UC Santa Barbara as they tried to resolve a longstanding issue of fluid friction—the resistance between ...
General Physics
Feb 2, 2023
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140
Researchers from Osaka University identify a system known as the "GET pathway" as essential for efficient regulation of the numbers of energy-producing mitochondria
Cell & Microbiology
Jan 31, 2023
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273
Mineral oil lubricants protect engine parts from wear, and this effect is enhanced by adding polymer nanoparticles to the lubricating oil. A UK team has now discovered that epoxy functionalization of these nanoparticles further ...
Nanophysics
Feb 1, 2023
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19
In addition to oxygen, nitrogen or carbon dioxide, the air we breathe contains small amounts of organic gases, such as benzene and toluene. These oxidize into small particles or aerosols that contribute to the condensation ...
Earth Sciences
Jan 31, 2023
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50
Deep below the ocean surface, the light fades into a twilight zone where whales and fish migrate and dead algae and zooplankton rain down from above. This is the heart of the ocean's carbon pump, part of the natural ocean ...
Earth Sciences
Feb 2, 2023
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14
Before going to the moon, the Apollo astronauts trained at various sites on Earth that best approximated the lunar surface, such as the volcanic regions Iceland, Hawaii and the U.S. Southwest. To help prepare for upcoming ...
Space Exploration
Jan 31, 2023
0
28
ESA's geology training course PANGAEA has come of age with the publication of a paper in Acta Astronautica that describes the quest for designing the best possible geology training for the next astronauts to walk on the surface ...
Space Exploration
Feb 2, 2023
1
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In mathematics, specifically in topology, a surface is a two-dimensional topological manifold. The most familiar examples are those that arise as the boundaries of solid objects in ordinary three-dimensional Euclidean space R3 — for example, the surface of a ball or bagel. On the other hand, there are surfaces which cannot be embedded in three-dimensional Euclidean space without introducing singularities or intersecting itself — these are the unorientable surfaces.
To say that a surface is "two-dimensional" means that, about each point, there is a coordinate patch on which a two-dimensional coordinate system is defined. For example, the surface of the Earth is (ideally) a two-dimensional sphere, and latitude and longitude provide coordinates on it — except at the International Date Line and the poles, where longitude is undefined. This example illustrates that not all surfaces admits a single coordinate patch. In general, multiple coordinate patches are needed to cover a surface.
Surfaces find application in physics, engineering, computer graphics, and many other disciplines, primarily when they represent the surfaces of physical objects. For example, in analyzing the aerodynamic properties of an airplane, the central consideration is the flow of air along its surface.
This text uses material from Wikipedia, licensed under CC BY-SA