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The last covid-free places on earth have something in common: Travel shutdowns
Now those islands are some of the only remaining corners of the globe where the coronavirus doesn’t exist, thanks to their total suspension of inbound tourism and other nonessential travel.
These 8 countries are accepting American travelers for remote-work trips
The islands of Samoa, which include the U.S. territory of American Samoa, closed to nonessential travel in March and have not recorded any confirmed coronavirus cases. To enter, U.S. citizens must hold permanent residency and request permission from the Samoan Health Ministry to travel on a commercial flight to Samoa through Auckland, New Zealand, before quarantining for 14 days.
X-Ray Scans of Ancient Egyptian Mummy Reveal a Surprising Discovery
An Egyptian mummy that was decorated with a woman’s portrait contained a surprise – the body of a child who was only 5 years old when she died.
Now, scientists have learned more about the mysterious girl and her burial, thanks to high-resolution scans and X-ray “microbeams” that targeted very small regions in the intact artifact.
Computed X-ray tomography (CT) scans of the mummy’s teeth and femur confirmed the girl’s age, though they showed no signs of trauma in her bones that could suggest the cause of her death.
Scientists Decipher the Sun’s Nuclear Fusion for the First Time
The discovery “reinforces our confidence that we understand how stars work.”
New Life
Scientists had already found neutrinos given off when the Sun fuses hydrogen into helium, a hallmark process of lighter stars that gives off 99 percent of the sun’s energy. The new discovery not only extended the lifespan of the Borexino detector — which was scheduled to be decommissioned next month — but also revitalized scientists’ understanding of the cosmos.
“Confirmation of CNO burning in our sun, where it operates at only one percent, reinforces our confidence that we understand how stars work,” UMass Amherst physicist Andrea Pocar said in the release.
YouTube is testing AI-generated video chapters
The feature could save YouTube creators from having to manually add chapters to the descriptions of their videos.
Intelligent Life Really Can’t Exist Anywhere Else
Hell, our own evolution on Earth was pure luck.
In newly published research from Oxford University’s Future of Humanity Institute, scientists study the likelihood of key times for evolution of life on Earth and conclude that it would be virtually impossible for that life to evolve the same way somewhere else.
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Direct Visualization of Quantum Dots Reveals Shape of Quantum Wave Function of the Trapped Electrons
Researchers used a scanning tunneling microscope to visualize quantum dots in bilayer graphene, an important step toward quantum information technologies.
Trapping and controlling electrons in bilayer graphene quantum dots yields a promising platform for quantum information technologies. Researchers at UC Santa Cruz have now achieved the first direct visualization of quantum dots in bilayer graphene, revealing the shape of the quantum wave function of the trapped electrons.
The results, published on November 23, 2020, in Nano Letters, provide important fundamental knowledge needed to develop quantum information technologies based on bilayer graphene quantum dots.
Elusive Internal Structure of Mars Revealed by Ancient Zircon Minerals From the Red Planet
Analysis of an ancient meteorite from Mars suggests that the mineral zircon may be abundant on the surface of the red planet.
By determining the age and hafnium isotope composition of zircons, researchers from the University of Copenhagen have shown that a population of these crystals were sourced from the deep interior of Mars. If the researchers are correct, it means that the young zircons contain information about the deep, inaccessible interior of Mars, which provides insights into the internal structure of the planet.
“Zircon are incredibly durable crystals that can be dated and preserve information that tell us about their origins. Having access to so many zircons is like opening a time window into the geologic history of the planet.” —