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It will take about five days to deploy the James Webb Space Telescopeâs fragile sunshade in a complex and high-risk procedure.
Cambridge scientists have identified a key signal that the fetus uses to control its supply of nutrients from the placenta, revealing a tug-of-war between genes inherited from the father and from the mother. The study, carried out in mice, could help explain why some babies grow poorly in the womb.
As the fetus grows, it needs to communicate its increasing needs for food to the mother. It receives its nourishment via blood vessels in the placenta, a specialised organ that contains cells from both baby and mother.
Between 10% and 15% of babies grow poorly in the womb, often showing reduced growth of blood vessels in the placenta. In humans, these blood vessels expand dramatically between mid and late gestation, reaching a total length of approximately 320 kilometres at term.
The growing interest in deep-space exploration has sparked the need for powerful long-lived rocket systems to drive spacecraft through the cosmos. Scientists at the U.S. Department of Energyâs (DOE) Princeton Plasma Physics Laboratory (PPPL) have now developed a tiny modified version of a plasma-based propulsion system called a Hall thruster that both increases the lifetime of the rocket and produces high power.
The miniaturized system powered by plasmaâthe state of matter composed of free-floating electrons and atomic nuclei, or ionsâmeasures little more than an inch in diameter and eliminates the walls around the plasma propellent to create innovative thruster configurations. Among these innovations are the cylindrical Hall thruster, first proposed and studied at PPPL, and a fully wall-less Hall thruster. Both configurations reduce channel erosion caused by plasma-wall interactions that limit the thruster lifetimeâa key problem for conventional annular, or ring-shaped, Hall thrusters and especially for miniaturized low-power thrusters for applications on small satellites.
Circa 2020
What do you get when you place a thin film of perovskite material used in solar cells on top of a magnetic substrate? More efficient hard drive technology. EPFL physicist LĂĄszlĂł ForrĂł and his team pave the way for the future of data storage.
âThe key was to get the technology to work at room temperature,â explains LĂĄszlĂł ForrĂł, EPFL physicist. âWe had already known that it was possible to rewrite magnetic spin using light, but youâd have to cool the apparatus toâ180 degrees Kelvin.â
Continue reading “Introducing the light-operated hard drives of tomorrow” »
Circa 2018
19-year-old Erik Finman, a self-made Bitcoin millionaire, took some free time to make a functional Dr. Octopus suit. Besides looking so cool, it also works as a prosthetic prototype.
Continue reading “Teenage Millionaire Built a Real-Life Dr. Octopus Suit” »
The theory rests on a phenomenon well-documented on Earth.
On early Mars, water hung on longer than it should have â that might be because of water clouds that prevented evaporation of rivers and lakes.
Sunny way.
A âbike highwayâ running between Daejon and Sejong in South Korea is a sight âor rather, a concept â, you surely havenât thought of before: It stretches for 20 miles (32 km), and it not only shields cyclists from the sun but also generates power at the same time.
Continue reading “South Korean 20-Mile Solar âBike Highwayâ Generates Electricity” »
Hyundai announced that it is shutting down its internal combustion engine development team as the automaker focuses on electric cars.
For 40 years the Korean automaker has been developing internal combustion engines to use in its vehicle lineup, but no more.
The Korea Economic Daily reports that Hyundaiâs new R&D chief Park Chung-kook confirmed in an email to employees that they are shutting down new engine development:
Been saying this for years!
A summary of decades of research on a rather âout-thereâ idea involving viruses from space raises questions on just how scientific we can be when it comes to speculating on the history of life on Earth.
Continue reading “A Weird Paper Tests The Limits of Science” »
And older women appeared to drive much of the plunge.
Serious cognitive problems declined 23% over a decade among women in the age group, compared to 13% among men, the study published last month in the Journal of Alzheimerâs Disease found.
