Monthly Archives: February 2020

Weird ‘watermelon snow’ pics show Antarctic turning red

Snow that looks like it was mixed with food coloring is not what you’d expect to see in Antarctica — or anywhere else, for that matter.

But that’s the bizarre phenomenon scientists recently photographed on an Argentine island in Antarctica.

The images, depicting a watermelon-colored snow, were revealed by Ukraine’s Ministry of Science and Education. Warmer weather during the Antarctic summer prompts the spores to germinate, triggering an algae bloom that creates these weird pockets of pink “watermelon snow,” the Daily Mail reported.

The bright red photosynthetic algae — which can thrive in very low temperatures — are located in snowfields around the world.

Scientists have photographed amazing images of 'watermelon snow' in Antarctica.

Scientists have photographed amazing images of ‘watermelon snow’ in Antarctica. ((Ministry of Science Ukraine; EAS))

The Ukrainian scientists told the Mail: “Such snow contributes to climate change, because the red-raspberry color snow reflects less sunlight and melts faster.”

By Christopher Carbone | Fox News

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Ancient engraving of warrior with ‘elaborate hairstyle’ and ‘pronounced butt’ discovered in Scotland

The Tulloch stone depicts a spear-holding ancient warrior.

The Tulloch stone depicts a spear-holding ancient warrior.
(Image: © Mark Hall et. al ; Antiquity 2020)

Archaeologists in Scotland have discovered an ancient monolith that’s engraved with a spear-holding warrior sporting an “elaborate hairstyle” and “pronounced” butt.

In September 2017, construction workers uncovered the stone monument in the northwest side of Perth in Scotland while clearing the ground to build a new road. They found the stone facedown and buried a little more than 3 feet (1 meter) in the ground

The so-called Tulloch stone is about 6.4 feet (1.9 m) high and 2.3 feet (0.7 m) wide; on one side, it depicts a human figure holding a spear with a “kite-shaped blade and a doorknob-style butt,” the authors wrote in a paper describing the findings, published Jan. 23 in the journal Antiquity.

The stone was buried near a ring ditch, possibly indicating that the monolith was part of a burial, according to the paper. The carving belonged to the Picts, an ancient, Celtic-speaking group that lived in what is now eastern and northern Scotland. (The Romans coined the name “Picts,” meaning the “painted people,” possibly in reference to the Picts’ distinctive tattoos or the war paint they wore.)

In the late Roman period, the Picts helped to defend the area that’s now known as Scotland from multiple Roman attacks; as such, in the early medieval period that followed, war became an important part of how the Picts’ society was organized.

We know from historical records and poetry that “the warrior is an essential part of society, the central part of power,”  said senior author Gordon Noble, a professor in the school of geosciences at the University of Aberdeen in the United Kingdom. Pictish society adopted a warrior way of life initially as a “form of resistance” against the Roman empire, but it later became an “inspiration” and a key part of their culture, he added.

It’s not clear what the warrior on this monolith — and similar ones previously found nearby depicting warrior figures holding “doorknob-butted spears” — represent, but they could be depictions of warrior gods or religious figures within this war-oriented Pictish ideology, Noble told Live Science. War ideology was common across a large part of Europe but was more typically represented through the burial of weapons with the dead.

Such burials, historical sources and poetry that depict  the “heroic warrior ethos” were common across Northern Europe but largely absent from northern Britain in the first millennium A.D. Rather, in northeastern Scotland, such values were publicly shown with carvings on monuments and likely associated with cemeteries belonging to the elite, the researchers noted in the paper.

The Tulloch stone is only one of three such Pictish monoliths found in the area with carvings of warriors on them. But there have been numerous other Pictish stones found with carvings of abstract or animal symbols often thought to be a simple way of representing names, Noble said.

“Over the last 10 years, it seems like we’ve had a new Pictish stone every year or even more than one every year,” Noble said. “So I’m sure more will come up, but the stones with images of warriors are still quite rare in the wider Pictish stone corpus.” The stone will eventually be put on display in the Perth Museum in Scotland.

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Cyborg locusts could be used to sniff out bombs, scientists say

Could cyborg locusts be the bomb-sniffing dogs of the future?

Scientists who received funding from the U.S. Navy revealed last week that they were able to program the bugs to sense various different smells, including from explosives.

The team’s preprint research paper, published in BioRxiv, states that the insects have been used to detect gases released by substances such as ammonium nitrate – often used by terrorist groups for bomb-making – as well as military explosives TNT and RDX.

The robot-bound locusts were exposed to five different explosives, and it only took 500 milliseconds of exposure for a distinct pattern of activity to appear in the locusts’ brains. The scientists chose locusts because their tiny antennae are filled with about 50,000 olfactory neurons.

 

Scientists put sensors on the insects to monitor neural activity and decode the odors presents in the environment. (Baranidharan Raman)

Scientists put sensors on the insects to monitor neural activity and decode the odors presents in the environment. (Baranidharan Raman) (Baranidharan Raman)

Researchers chose locusts because they are sturdy and can carry heavy payloads, according to the preprint paper. They implanted electrodes into the insects’ brains to analyze their neural activity when they were around different substances.

The U.S. Office of Naval Research had allocated $750,000 for the project back in 2016.

Although the team has not commented about its new work, lead scientist Baranidharan Raman, associate professor of biomedical engineering in the School of Engineering and Applied Science at Washington University at St. Louis, expressed optimism when he received the grant.

“We expect this work to develop and demonstrate a proof-of-concept, hybrid locust-based, chemical-sensing approach for explosive detection,” Raman told The Source.

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‘Curse tablets’ found in 2,500-year-old Greek well

Archaeologists have unearthed 30 tablets, each engraved with curses, at the bottom of an ancient well in Greece, according to a report.

The small “curse tablets” discovered in the Kerameikos cemetery in Athens invoke the gods of the underworld in order to cause harm, or curse, others.

Jutta Stroszeck, director of the excavation on behalf of the German Archaeological Institute in Athens, told Greek City Times last week that it’s unclear who ordered the curses because they are never mentioned by name — unlike the recipient.

Curses on tablets were fairly typical practices in ancient Rome and Greece, according to historians. The tablets date back to the fourth century BCE.

Thirty curse tablets have been found in an ancient well in the Athenian cemetery Kerameikos (seen here).

Thirty curse tablets have been found in an ancient well in the Athenian cemetery Kerameikos (seen here). (Chris Hellier/Corbis/Getty)

Christopher Faraone, a professor of classics at the University of Illinois, said that in ancient Athens, most curses were not about killing a person.

“Most of the curses are what we call binding spells: they aim at binding or inhibiting the performance of a rival. A lot of them have to do with legal cases. They say things like, ‘Bind the tongue and the thoughts of so-and-so, who is about to testify against me on Monday,'” Faraone said in a question-and-answer. “We have some that are aimed at rival musicians or actors, and a couple that seem to be connected with athletics. We have some that run something like this, ‘Bind Helen, so that she is unsuccessful when she flirts or makes love with Demetrius.’ But the great majority of them seem to be connected with lawsuits.”

Kerameikos is named after a community of potters that once lived there, according to the Greek Ministry of Culture and Sports.

Besides tablets, the team also found pottery for drinking, some wooden products, cooking pots, clay lamps and bronze coins.

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