Knowledge Update

​Washington, Nov 17 (IANS) Scientists have discovered a "great valley" in the southern hemisphere of Mercury, providing more evidence that the small planet closest to the sun is shrinking.

Scientists used images from NASA's MESSENGER spacecraft to create a high-resolution topographic map that revealed the broad valley -- more than 1,000 kilometres long -- extending into the Rembrandt basin, one of the largest and youngest impact basins on Mercury. 

"Unlike Earth's Great Rift Valley, Mercury's great valley is not caused by the pulling apart of lithospheric plates due to plate tectonics; it is the result of the global contraction of a shrinking one-plate planet," said lead author of the study Tom Watters, senior scientist at the Smithsonian National Air and Space Museum in Washington, D.C. 

About 400 kilometres wide and three kilometres deep, Mercury's great valley is smaller than Mars' Valles Marineris, but larger than North America's Grand Canyon and wider and deeper than the Great Rift Valley in East Africa, said the study published in the journal Geophysical Research Letters.

Mercury's great valley is bound by two large fault scarps ? cliff-like landforms that resemble stair steps. 

The scarps formed as Mercury's interior cooled and the planet's shrinking was accommodated by the crustal rocks being pushed together, thrusting them upward along fault lines, the study said.

NASA's MErcury Surface, Space ENvironment, Geochemistry and Ranging (MESSENGER) mission was launched on August 3, 2004 to understand Mercury, the smallest, densest and least-explored of the terrestrial planets.

​Berlin, Nov 15 (IANS) The German economic growth rose slightly in the third quarter of 2016, official data showed on Tuesday.

Germany's gross domestic product (GDP) increased by 0.2 per cent quarter on quarter, Xinhua news agency quoted German federal statistics office Destatis as saying.

​San Francisco, Nov 16 (IANS) At a time when governments and enterprises the world over are brainstorming over ways to secure their data on the Cloud platform, a right mix of security in both hardware and software is the key to ward off hackers and minimise cyber attacks, a top security expert has reiterated.

​London, Nov 16 (IANS) Brexit could be delayed by months, even as long as two years, after a Supreme Court judge of Britain suggested that "comprehensive" legislation was required to trigger Article 50.

San Francisco, Nov 16 (IANS) In a move to "democratise" artificial intelligence (AI) and making it accessible to everyone, Microsoft has teamed up with OpenAI, a non-profit AI research organisation co-founded by Elon Musk.

​New York, Nov 16 (IANS) Set to become one of the highest-profile stock debuts along with Chinese e-commerce company Alibaba and social media giant Facebook, photo and video sharing app Snap Inc has filed paperwork for an initial public offering (IPO) that may value the messaging platform at as much as $25 billion, media reported.

​New York, Nov 16 (IANS) Researchers at The Rockefeller University in New York said they discovered two promising new antibiotics by sifting through the human microbiome with the help of a software.

​London, Nov 16 (IANS) Love to binge on fatty foods such as oily samosas and cheese-laden pizzas? Beware, as a new study warns that such children may be at risk of developing cognitive and psychiatric problems such as schizophrenia or Alzheimer's disease in their adulthood. According to the study, diets rich in fat deplete the levels of a key protein known as reelin which help synapses in the brain to work properly. This hampers behavioural flexibility and memory. Low levels of reelin have been associated with a higher risk of developing Alzheimer's disease in later life. "These changes from a young age onwards are more the result of the fatty foods themselves, and the impact they have on young brains, rather than arising from the mere fact of being obese," said Urs Meyer from ETH Zurich in Switzerland. The authors focused on a prefrontal cortex -- a brain region -- associated with the planning of complex actions and decision making, expressing one's personality and controlling one's social behaviour. Adolescents eating high-fat diets were found to have cognitive deficits due to the immature character of the prefrontal cortex during this time frame. "We saw that plasticity in the prefrontal cortex was impaired in animals fed high-fat foods during adolescence and quite remarkably we then observed that when restoring reelin levels, both synaptic plasticity and cognitive functions went back to normal," explained Pascale Chavis from the INMED Institute in France. A careful nutritional balance during this sensitive period is pivotal for reaching the full capacity of adult prefrontal functions, the researchers said, in the paper published in the journal "Molecular Psychiatry".

Abu Dhabi, Nov 16 (IANS/WAM) The United Arab Emirates and France will cooperate to protect cultural heritage during armed conflicts.

This initiative will be launched by Sheikh Mohamed bin Zayed Al Nahyan, Crown Prince of Abu Dhabi and Deputy Supreme Commander of the UAE Armed Forces, and Francois Hollande, President of France, it was announced at the Safeguarding Endangered Cultural Heritage Conference here.

The conference is being organised in response to the growing threats to some of the world's most important cultural resources arising from sustained periods of armed conflicts, acts of terrorism and illicit trafficking of cultural property.

The systematic destruction or looting of historic sites and monuments representing civilisations that go back millennia, like in Afghanistan, Syria, Iraq, Mali, and throughout the world, are among the cases that have motivated the UAE and France to partner and to support Unesco's global mandate to protect cultural heritage during armed conflicts, according to Abu Dhabi Tourism and Culture Authority.