Octopuses Turn Black, Posture Aggressively To Intimidate Each Other

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A recent study of octopuses off the coast of Australia has discovered that — despite usually being considered a solitary animal — octopuses have a social life, and part of that social life involves physical displays of toughness.

When octopuses meet each other in agonistic interactions, they exhibit certain types of behavior, researchers at the Alaska Pacific University found.

“We found that octopuses are using body patterns and postures to signal to each other during disputes,” said David Scheel of Alaska Pacific University.

“The postures and patterns can be quite flashy, such as standing very tall, raising the body mantle high above the eyes, and turning very dark.”

The impetus for the research came from a member of an online cephalopod community noting something he’d seen octopuses doing that he thought was interesting. The researchers took it from there, watching 186 interactions between Octopus tetricus — a species that lives in Jervis Bay, Australia — which furnished them with 500 interactions.

The agonistic behavior was what they noticed primarily.

When both octopuses turned black, it was more likely they would engage in physical violence to settle the question of dominance, but when one turned black and the other was a pale color, the pale colored octopus more often retreated while the black octopus held the field.

“Dark color appears to be associated with aggression, while paler colors accompany retreat,” said Scheel.

Next for the researchers is further investigation of octopus interactions — specifically, they want to investigate suspicions that social interactions among the species occur when food is abundant and hiding places scarce. They also want to understand the consequences of these types of social interactions in the context of octopus populations.

The report, “Signal Use by Octopuses in Agonistic Interactions,” was completed by Drs. David Scheel, Peter Godfrey-Smith and Matthew Lawrence, and was published in the journal Current Biology.

By Andy Stern

Possible new law of nature on the way

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The world of physics is excited about strong but early evidence about the behavior of muons, paricles identical to electrons only 200x more massive (heavier), which once born take 2.2 microseconds to decay into an electron, and which spin like tops. In a new, extremely precise measurement, they were made to wobble using magnetic fields but they unexpectedly wobbled quite significantly faster than the Standard Model suggests they would. They might spin so fast due to an unknown force caused by an unknown particle, and this is what is so exciting.

“We found that a muon … is not in agreement with our current best theory of physics at the subatomic level, and … it potentially points to a future with new laws, new particles and new forces in physics which we haven’t seen to date,” said Professor Mark Lancaster at U of Manchester.

“The main goal of the experiment is to make the measurement and compare with the theory, and if they disagree then it’s telling us that there’s something in nature which is not in the theory,” explained James Mott at Fermilab.

The four known forces of nature (gravity, electricity, two nuclear forces: strong and weak interactions) have left scientists without an answer for some observed phenomena, such as the speed at which galaxies spin (faster than the best model suggests). Therefore, they continue to search for glitches in their already-tight models which might point them things they don’t yet know about.

The most recent work was done at Fermilab (Muon g-2 experiment), but a similar experiment was already done earlier at the Large Hadron Collider. These tools accelerate particles in large rings at close to the speed of light.

The evidence needs more tests for greater certainty, particularly to rule out the possibility of a systematic error, and particularly with a new, independent experiment, but physicists will be chasing this line of experiment eagerly.

“This is outstanding confirmation of experimental technique, and very, very suggestive of the possibility of new physics,” noted scientist David Hertzon of U of Washington.

By the editors

#AnomalousMagneticDipoleMomentOfTheMuon #QuantumElectrodynamics

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People in Kachin state demonstrate against China

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YANGON, Myanmar – The people in the Pharkant area of Kachin state demonstrated against China this week, drawing a cross on the Chinese flag and burning a picture of Myanmar’s military leader Min Aung Hlaing.

“China stands with the military leader,” shouted the demonstrators.

By Htay Win
Photo credit Aye Yarwaddy

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Myanmar military council arrests the artist Zarganar

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YANGON, Myanmar – The artist Zarganar was arrested by the Myanmar military council from his home in Tarmwe township, Yangon this morning.

Zarganar is not only a director but also a comedian famous for political jokes since the 1988 democratic revolution.

Zarganar was arrested by the Myanmar military many times before 2010.

By Htay Win
Photo credit Zarganar page

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Kayin IDPs struggle to get for food

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YANGON, Myanmar – Kayin internally displaced people are desperate for food, clothing and shelter, hiding in the forest from the air strikes of the Myanmar military.

The IDPs fled to neighboring Thailand, but Thai government turned them back. However, Wednesday morning the Thai government opened Maeseli jetty in Maehaungsaung district to sending rations and medicines over the border to Kayin state, according to a Thai media.

By Htay Win

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Twenty Myanmar celebrities charged with incitement

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YANGON, Myanmar -They were charged under the country’s media law with inciting government employees to join the popular civil disobedience movement (CDM) through social media.

Celebrities took part in the NLD election campaigns and are thought to have played a large part in influencing the public, particularly Myanmar’s youth, to vote for Aung San Suu Kyi.

By Htay Win
Photo credit Myanmar celebrity

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