Musk has scored bragging rights in the battle of billionaires in space after his SpaceX rockets beat competition from Bezos’s Blue Origin to launch National Security payloads for the U.S. Air Force.
International team develops a new method to determine the origin of stardust in meteorites.
Analysis of meteorite content has been crucial in advancing our knowledge of the origin and evolution of our solar system. Some meteorites also contain grains of stardust. These grains predate the formation of our solar system and are now providing important insights into how the elements in the universe formed.
Working in collaboration with an international team, nuclear physicists at the U.S. Department of Energy’s (DOE’s) Argonne National Laboratory have made a key discovery related to the analysis of “presolar grains” found in some meteorites. This discovery has shed light on the nature of stellar explosions and the origin of chemical elements. It has also provided a new method for astronomical research.
Microsoft is redesigning the clipboard in Windows 10 to include images, GIFs, emojis and more.
Ensuring nobody goes to bed hungry.
Almost 690 million people in the world were undernourished in 2019 – that’s 8.9% of the world population, a new UN report says. This figure could exceed 840 million by 2030 if current trends continue.
Continue reading “Global hunger fell for decades, but it’s rising again” »
Brain death can be a tricky concept. Clarity from an international group of doctors may help identify when the brain has stopped working for good.
Physicists have long sought to understand the irreversibility of the surrounding world and have credited its emergence to the time-symmetric, fundamental laws of physics. According to quantum mechanics, the final irreversibility of conceptual time reversal requires extremely intricate and implausible scenarios that are unlikely to spontaneously occur in nature. Physicists had previously shown that while time-reversibility is exponentially improbable in a natural environment—it is possible to design an algorithm to artificially reverse a time arrow to a known or given state within an IBM quantum computer. However, this version of the reversed arrow-of-time only embraced a known quantum state and is therefore compared to the quantum version of pressing rewind on a video to “reverse the flow of time.”
In a new report now published in Communications Physics, Physicists A.V. Lebedev and V.M. Vinokur and colleagues in materials, physics and advanced engineering in the U.S. and Russia, built on their previous work to develop a technical method to reverse the temporal evolution of an arbitrary unknown quantum state. The technical work will open new routes for general universal algorithms to send the temporal evolution of an arbitrary system backward in time. This work only outlined the mathematical process of time reversal without experimental implementations.
The White House and Pentagon presented plans Monday to help U.S. telecom companies build out new ultrafast 5G networks by allowing commercial use of airwaves previously reserved for military radar.
For a few months in 2018, as NASA’s Dawn spacecraft used up its last drops of fuel, it gave scientists an incredibly detailed look at one of the strangest places in the solar system: Occator Crater.
SpaceX is manufacturing its Starlink satellites at an unprecedented rate for the space industry, analysts say, as the company dives headlong into building a space-based global internet service.
Elon Musk’s company told the Federal Communications Commission in a presentation last month that its Starlink unit is “now building 120 satellites per month” and has “invested over $70 million developing and producing thousands of consumer user terminals per month.”
“Invested hundreds of millions of dollars in Starlink to date,” the SpaceX presentation added.
