A team of researchers from Sydney’s University of New South Wales and the South Australian Museum have investigated how the reversal of Earth’s magnetic pole about 42,000 years could have changed earth’s atmosphere. CNN reports: “Using the ancient trees we could measure, and date, the spike in atmospheric radiocarbon levels caused by the collapse of Earth’s magnetic field,” Chris Turney, a…
Tag: america
America has sent five rovers to Mars—when will humans follow?
With its impeccable landing on Thursday, NASA’s Perseverance became the fifth rover to reach Mars—so when can we finally expect the long-held goal of a crewed expedition to materialize? Source: https://phys.org/news/2021-02-america-rovers-marswhen-humans.html…
The First Black Hole Ever Discovered is More Massive Than We Thought
Neel V. Patel, writing at MIT Technology Review: Einstein first predicted the existence of black holes when he published his theory of general relativity in 1916, describing how gravity shapes the fabric of spacetime. But astronomers didn’t spot one until 1964, some 6,070 light-years away in the Cygnus constellation. Geiger counters launched into space detected cosmic x-rays coming from a region…
Meet Elizabeth Ann, the First Cloned Black-Footed Ferret
Her birth represents the first cloning of an endangered species native to North America, and may bring needed genetic diversity to the species. From a report: Last year, Ben Novak drove across the country to spend New Year’s Eve with a black-footed ferret. Elizabeth Ann had just turned 21 days old — surely a milestone for any ferret but a particularly…
Why Google’s Internet Balloon Project Loon Failed
Alphabet announced last month that it was winding down Loon, a nine-year-old project and a two-and-a-half-year-old spin off firm, after failing to find a sustainable business model and partners for one of its most prominent moonshot projects. Business Insider shares more details on why the project failed. From the report, which may be paywalled: CEO Alastair Wingarth told The New York…
Moon skims past Mars and Aldebaran February 17-19, 2021
The waxing crescent moon pairs up with the faint planet Uranus on February 17, flits by the red planet Mars on February 18, and then joins up with the red star Aldebaran on February 19. Source: https://earthsky.org/tonight/moon-mars-aldebaran-feb-17-18-19-2021…
Knifefish use electric fields to develop a complex social hierarchy
The brown ghost knifefish of South America can generate electric signals – and they seem to use them to develop and maintain a sophisticated social hierarchy Source: https://www.newscientist.com/article/2268008-knifefish-use-electric-fields-to-develop-a-complex-social-hierarchy/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home…
Hunkering down in winter weather
Snow, ice and cold temperatures wreak havoc across much of the United States in February. Source: https://earthsky.org/todays-image/junco-snow-winter-storm-february-2021…
How the NSA-led US Cyber Command Wishes You a Happy Valentine’s Day
Slashdot reader DevNull127 writes: The U.S. Cyber Command, headed by the National Security Agency’s director, has been a part of America’s Department of Defense since 2009. Today this unified combatant command wished its followers on Twitter a happy Valentine’s Day, adding “As our gift to you, we present 12 crypto challenges designed by the information security community. “Love is in the…
Microsoft Urges America to Force Google and Facebook to Pay for News
“Microsoft has said the USA should copy Australia’s plan to force Google and Facebook to pay for links to news content,” reports The Register, “and suggested that doing so will help improve social cohesion and strengthen democracy.” But Google has fired back with a statement asserting that Microsoft’s motives are impure. “Of course they’d be eager to impose an unworkable levy…