At present, the formation of galaxies is difficult to understand without the presence of a ubiquitous, but mysterious component, termed dark matter. Astronomers have measure how much dark matter there is around galaxies, and have found that it varies between 10 and 300 times the quantity of visible matter. However, a few years ago, the discovery of a very diffuse object, named Dragonfly 44, changed this view. It was found that this galaxy has 10,000 times more dark matter than the stars. Taken back by this finding, astronomers have made efforts to see whether this object is really anomalous, or whether something went wrong in the analysis of the observations. Now we have the answer.
An international team led by the Kapteyn Institute of the University of Groningen (the Netherlands), with participation by the Instituto de Astrofísica de Canarias (IAC) and the University of La Laguna (ULL), has found that
A tiny tardigrade can survive intense ultraviolet radiation for an hour by glowing in the dark. “It acts like a shield,” says Sandeep Eswarappa at the Indian Institute of Science in Bangalore.
Tardigrades, also known as water bears, are animals around 1 millimetre long. They are famous for being able to withstand extreme conditions that would kill most organisms, such as being completely dried out.
Studying moss at their institute’s campus, Eswarappa and his colleagues found what may be a new species of tardigrade, though they don’t yet have enough information to formally describe it. For now, they are calling it Paramacrobiotus BLR, short for Bangalore.
“We found this particular tardigrade in many places, especially in places that are well lit with sunlight,” says Eswarappa. The researchers
PATTEN, Maine — A new moon over Katahdin Woods and Waters National Monument on Oct. 15 will allow the darkest skies in the Northeastern United States to be absent of moonlight, making thousands of stars and the Milky Way galaxy visible to the naked eye.
To mark the occurrence, the Friends of Katahdin Woods and Waters organization will hold its seventh annual Stars Over Katahdin event, along with a new organization, Dark Sky Maine. It won’t be held at the monument as in years past, but will be virtual, meeting the same fate of other events during the time of COVID-19.
One of the most puzzling components of the Universe has to be dark matter. Although we have extraordinary astrophysical evidence that the normal matter in the Universe — the stuff made out of known particles in the Standard Model — cannot account for the majority of the gravitational effects we observe, all of that evidence is indirect. We still have yet to obtain a shred of repeatable, verifiable direct evidence for whatever particle might be responsible for dark matter. The total evidence places very tight constraints on any non-gravitational interactions
Ford Motor Company has issued a recall of more than 700,000 of its vehicles in North America following an issue with their rearview cameras, which can suddenly go dark or show distorted images.
The recall applies to most 2020 versions of Ford’s F-Series trucks, the 2020 Explorer, Mustang, Transit, Expedition, Escape, Ranger and Edge, as well as the Lincoln Nautilus and Corsair, the Associated Press (AP) reported.
The company is unaware of any crashes or injuries caused by the latest issue, AP reported.
The problem was said to be caused by a poor electrical connection, the company noted in documents posted Wednesday by the National Highway Traffic Safety Administration (NHTSA).
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The recall will begin on November 7 and all dealers will replace the rearview cameras at no cost to car owners.
To see if your vehicle is being recalled, enter its Vehicle Identification Number (VIN) at
Physicists are on the hunt for dark forces. These forces are not as ominous as they sound: “dark” simply refers to the fact that no one has observed them before. In this case, they would act between neutrons and electrons.
One path to investigating dark forces involves using lasers to make precision measurements of isotopes (atoms of an element possessing different numbers of neutrons).If there is a dark force working behind the scenes, it could affect an isotope’s energy levels—discrete regions around the atom’s nucleus where its electrons exist.
Now two teams have independently performed the most precise measurements of this type.Their findings, reported this month in Physical Review Letters, are mixed: One group, led by researchers at Aarhus University in Denmark, analyzed calcium isotopes and saw no deviation from predictions. But the other team, led by scientists at the Massachusetts Institute of Technology, used ytterbium isotopes and
“Knowing your own darkness is the best method for dealing with the darknesses of other people.” —Carl Jung
What is our fascination with “dark personalities”? So many of us, like the proverbial moth to the flame, are drawn to people who don’t exactly follow the Golden Rule. Narcissism, psychopathy, Machiavellianism—for the Dark Tetrad add “everyday sadism”.
The media romanticizes these traits, and there may be some sick chemistry early on in (often dysfunctional) relationships. On average, dark traits are often disadvantageous, setting us up for future issues, including an increased risk for emotionally abusive relationships and pathological narcissism when present in parental interactions.
There are evolutionary arguments as to why dark traits persist in the population, and some evidence to back it up. Exploitative and opportunistic behaviors are adaptive during time of scarcity. Research shows that people high in narcissistic traits are able to paint themselves in the best possible
A UK national pleaded guilty today to extorting tens of companies across the world as a member of an infamous hacking group known as The Dark Overlord (TDO).
Nathan Francis Wyatt, 39, was sentenced to five years in prison and ordered to pay $1,467,048 in restitution to victims.
According to court documents, Wyatt was part of the TDO hacker group since 2016. The group operated by hacking into large companies, stealing their sensitive data, and then asking for huge ransoms.
If victims didn’t pay, the hackers would sell their data on hacking forums, leak it on the public internet, or tip journalists about the breach in order to generate negative press for the hacked company.
Wyatt’s role in the scheme was to contact victims and demand ransom payments. He was connected to the group after he used phone numbers registered in his name to contact some of the victims.
Each winter, Baffin Bay freezes over as polar darkness descends over the top of the world.
Come spring, phytoplankton will bloom in these cold waters between Greenland and Canada, bolstering a bustling ecosystem of beluga whales and narwhals (SN: 4/8/20). But scientists have long assumed that the photosynthetic algae remain largely dormant in winter, blocked off from light by thick sea ice and snow.
New research challenges that assumption, however, finding that phytoplankton under the bay’s ice start growing as early as February, when the sun barely blips above the Arctic’s horizon.
Achim Randelhoff, an oceanographer at Université Laval in Quebec City, and colleagues deployed autonomous submersible floats in Baffin Bay that can measure photosynthetic activity and algae concentrations underwater.
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