Landing safely on an asteroid is no mean feat. Despite several recent successes, there have also been notable failures—most famously, the Philae lander to 67P/Churyumov-Gerasimenko. Admittedly, that was an attempt to land ...
Space Exploration
Nov 8, 2023
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Information transfer in free space using ultraviolet, visible, or infrared waves has been gaining interest because of the availability of large bandwidth for high-data-rate communication. However, the presence of opaque occlusions ...
Optics & Photonics
Nov 6, 2023
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159
In 1916, famed theoretical physicist Albert Einstein put the finishing touches on his theory of general relativity, a geometric theory for how gravity alters the curvature of spacetime. The revolutionary theory remains foundational ...
Astronomy
Nov 6, 2023
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The chemical and thermal stable inorganic cesium lead triiodide (CsPbI3) perovskite has shown great potential for photovoltaic applications. DMAPbI3 (dimethylammonium [DMA]) or "HPbI3"-assisted crystallization is effective ...
Analytical Chemistry
Nov 6, 2023
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22
Oil-rich Gulf states have positioned themselves as both champions of climate innovation and guardians of fossil fuel interests—a balancing act experts warn could derail action at COP28 in Dubai.
Environment
Nov 2, 2023
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The Kolubara coal mine in Serbia never closes—24 hours a day, 365 days per year, excavators work around the clock gnawing away at the soil to extract the fossil fuel.
Environment
Nov 2, 2023
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Designing a heat engine that can produce maximum power at maximum efficiency is a major challenge. Practical heat engines are limited to a theoretical efficiency called the Carnot limit, which sets a cap on how much heat ...
General Physics
Nov 1, 2023
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58
Massive wildfires in Canada, Greece and Hawaii. All-time record heat waves. Hurricanes with surprising ferocity, like the one that devastated Acapulco last week.
Earth Sciences
Nov 1, 2023
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Humans have increased the concentration of potentially toxic mercury in the atmosphere sevenfold since the beginning of the modern era around 1500 C.E., according to new research from the Harvard John A. Paulson School of ...
Earth Sciences
Nov 1, 2023
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46
Sperm can modulate their energetics by regulating their flagellar waveform—how the sperm oscillate their tails—in order to adapt to varying fluid environments, potentially optimizing their motility and navigation within ...
Cell & Microbiology
Nov 1, 2023
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