Reference Terms
from Wikipedia, the free encyclopedia
Helicopter
A helicopter is an aircraft which is lifted and propelled by one or more horizontal rotors (propellers).
Note: The above text is excerpted from the Wikipedia article "Helicopter", which has been released under the GNU Free Documentation License.
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Matter & Energy News
June 3, 2025
May 27, 2025 — Engineers developed a fuel cell that offers more than three times as much energy per pound compared to lithium-ion batteries. Powered by a reaction between sodium metal and air, the device could be lightweight enough to enable the electrification of ...
May 14, 2025 — A new study achieves unprecedented accuracy in modelling extreme cosmic events like black hole and neutron star collisions by calculating the fifth post-Minkowskian (5PM) order, crucial for interpreting gravitational wave data from current and ...
May 8, 2025 — In space, energetic neutrinos are usually paired with energetic gamma rays. Galaxy NGC 1068, however, emits strong neutrinos and weak gamma rays, which presents a puzzle for scientists to solve. A new paper posits that helium nuclei collide with ...
May 8, 2025 — A new study of the 28 most populous U.S. cities finds that all are sinking to one degree or another. The cities include not just those on the coasts, where relative sea level is a concern, but many in the interior. Furthermore, using newly granular ...
Latest Headlines
updated 12:56 pm ET
June 3, 2025 — A new type of mRNA vaccine is more scalable and adaptable to continuously evolving viruses such as SARS-CoV-2 and H5N1, according to a new ...
June 3, 2025 — New research demonstrates that with collaboration between stakeholders, Australia can fully decarbonize its domestic and energy export economies by ...
June 2, 2025 — Researchers have synthesized a new compound called infuzide that shows activity against resistant strains of ...
June 3, 2025 — A new study found exposure to specific tiny particles in air pollution during pregnancy are associated with increased risk of various negative birth ...
June 3, 2025 — A new study details processes that keep pollutants aloft despite a drop in ...
June 2, 2025 — Scientists have reported use of antibacterial coatings made from resilin-mimetic proteins to fully block bacteria from attaching to a surface. A protein that gives fleas their bounce has been used to ...
June 2, 2025 — Electronics often get thrown away after use because recycling them requires extensive work for little payoff. Researchers have now found a way to change the ...
June 2, 2025 — Physicists have developed a lens with 'magic' properties. Ultra-thin, it can transform infrared light into visible light by halving the wavelength of incident ...
June 2, 2025 — Despite advances in machine vision, processing visual data requires substantial computing resources and energy, limiting deployment in edge devices. Now, researchers from Japan have developed a ...
June 2, 2025 — Researchers have recreated the world's oldest synthetic pigment, called Egyptian blue, which was used in ancient Egypt about 5,000 years ...