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Origin of the Turtle Shell Solved With a Child's Help

Current Biology claims that this was not always the case. Rather, the authors suggest that broad ribbed proto-shells were actually an adaption to help with burrowing underground. Eight year old Kobus Snyman was walking on his father’s farm in the Western Cape of South Africa when he found the remains of a proto-turtle. The specimen proved to be the missing piece in the puzzle for the group of scientists striving to determine the origin of turtle shells. Measuring about 15 cm in length, the specimen Snyman discovered is in remarkably good condition, comprising a well preserved skeleton with fully articulated feet and hands. It is an example of Eunotosaurus africanus, a partially shelled turtle that lived around 260 million years ago. “Why the turtle shell evolved is a very Dr. Seuss like question and the answer seems pretty obvious – it was for protection.” said lead author of the study, Dr. Tyler Lyson of the Denver Museum of Nature and Science. “But just like the bird feather did not initially evolve for flight – we now have early relatives of birds such as tyrannosaur dinosaurs with feathers that definitely were not flying – the earliest beginnings of the turtle shell was not for protection but rather for digging underground to escape the harsh South African environment where these early proto turtles lived”. Understanding the importance of ribs in turtles was crucial to the team’s results. “We knew from both the fossil record and observing how the turtle shell develops in modern turtles that one of the first major changes towards a shell was the broadening of the ribs.” said Lyson, in a press release. Because ribs are crucial to both respiration and movement, changes in them have a major impact on all four legged animals. When ribs broaden they stiffen the torso, in turn shortening stride length, slowing down the animal and impeding its breathing. “Ribs are generally pretty boring bones. The ribs of whales, snakes, dinosaurs, humans, and pretty much all other animals look the same. Turtles are the one exception, where they are highly modified to form the majority of the shell.” explained Lyson. The breakthrough for the team came with the discovery of several specimens of Eunotosaurus africanus in the Karoo Basin of South Africa. Analysis of the fossils revealed that the broadening of the ribs in this creature had nothing to do with protection, but was rather a means to provide a more stable base when the animal used its front limbs to dig underground. Professor Rubidge from the University of Witwatersrand in South Africa, who was one of the scientists gathering fossils for the study, made it clear how important Snyman’s contribution had been. “I want to thank Kobus Snyman and shake his hand because without Kobus both finding the specimen and taking it to his local museum, the Fransie Pienaar Museum in Prince Albert, this study would not have been possible.” For more information: www.cell.com Image courtesy of Tyler R. Lyson]]>

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Editorial

Annie Besant – From Atheist to Socialist to Theosophist

Seven Principles of Man and Thought Power – Its Control and Culture, give an insight into the ways she strove to reconcile abstract philosophical ideas with contemporary social and political issues. Besant was born Annie Wood in London in October 1847. Her father died when she was just five years old, while her mother persuaded a family friend to take responsibility for Annie, raising her and ensuring she received a good education. In 1867 she married a clergyman named Frank Besant, but the relationship seemed doomed from the start. Although raised in a pious family, Besant started to have serious doubts about her beliefs during her twenties. Becoming an atheist and increasingly anti-Church, she legally separated from her husband and the father of her two children in 1873. Her anti-religious views soon evolved into a broader questioning of all of society’s accepted norms. From producing pamphlets criticising the church, and in particular the state’s hold over it, she became an activist for a whole host of causes of the time. She gained notoriety in 1877 for working with Charles Bradlaugh to publish Charles Knowlton’s ‘Fruits of Philosophy’, a pamphlet which advocated birth control. Bradlaugh and Besant were both charged with publishing an obscene libel “likely to deprave or corrupt those whose minds are open to immoral influences.” Increasingly radical in her thinking, Besant became a supporter of Fabian socialism. She gained a reputation as a formidable public speaker and essayist, helping organise the strike of the workers at the Bryant and May match factory in East London among other activities geared towards campaigning for greater workers’ rights and equality for women. In 1889, Besant converted to Theosophy, a religious philosophy which both ‘The Seven Principles of Man’ and ‘Thought Power: Its Control and Nature’ focus on. With roots in ancient Gnosticism and Neoplatonism, Theosophy also had ties to Hindu ideas of karma and reincarnation. Although broken down into several different forms, a common feature of Theosophy is the idea of a deeper spiritual reality that can be reached through intuition and meditation. For Besant, Theosophy’s mixture of Eastern and Western philosophy seems to have been a way to achieve spirituality without recourse to a specific religion. In particular, she considered Theosophy a means to liberate thought from the boundaries placed upon it in traditional society. An excerpt from ‘Thought Power: Its Control and Culture’, gives an insight into the ways in which she felt it could prove intellectually liberating. “This little book is intended to help the student to study his own nature, so far as its intellectual part is concerned. If he masters the principles herein laid down, he will be in a fair way to co-operate with Nature in his own evolution, and to increase his mental stature far more rapidly than is possible while he remains ignorant of the conditions of his growth.” From 1907 until her death, Besant was president of the International Theosophical Society. Standing against discrimination of any kind and attempting to reconcile different religious beliefs under a common spirituality, Theosophy was a philosophy which connected all the causes Besant had fought for, providing her with a universal truth that didn’t rely on typical religious constraints. Besant eventually settled in India, involving herself in the Indian nationalist movement. In 1916 she helped found the Home Rule League, which campaigned for Indian self government. In 1917 she was jailed for sedition for her role in publishing ‘New India’, a newspaper which criticised British rule in India. She died in September 1933. ]]>

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Archaeologists Discover Early Neolithic Village on Cyprus

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Remains of Pre-Roman Farms Found in English National Park

Historic England aerial investigation manager Helen Winton said the discovery of the long-forgotten Roman road was one of the true highlights of the project, despite the true bounty of “exciting” results the LIDAR study yielded. The South Downs National Park may have prehistoric roots, but it’s a relatively new addition to England’s national park system. Becoming fully operational on April 1st, 2011, the park covers a massive 628 square miles across the counties of East Sussex, West Sussex and Hampshire. The park itself stretches for 87 miles, terminating at the chalk headland known as Beachy Head, the highest chalk sea cliff in Britain. ]]>

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News

The Key to Democracy? Secret Ballot Made Law in 1872 Ballot Act

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Useful or Not, T. Rex-Like Limbs May Have Evolved Numerous Times

T. rex and G. shinyae had such disproportionate forearms remains a mystery. The function of such seemingly useless forelimbs has perplexed experts and amateurs alike. An initial theory was that T. rex used its arms to hold a mate, others have suggested the arms were used to hold prey in place, (an earlier study hypothesized the arms were capable of maneuvering more than 400 pounds) or to help itself stand up – assuming the dinosaur ever sat. The current theory is that these short forelimbs were, in actuality, totally useless. Researchers are hopeful that learning how these shortened forelimbs evolved may help solve the puzzle. The study has been published in the journal PLOS ONE. ]]>

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Transition to Agrarian Lifestyle Not Tied to Genetics

Science, is available here Image courtesy of Fereidoun Biglari, National Museum of Iran]]>

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News

The Babington Plot: Spies, Secret Code and the Letter That Killed a Queen

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Archaeologists Find Evidence of Scotland’s Earliest Farmers

The Courier, “Evidence for ploughing and fields in Neolithic Britain is incredibly rare and so the excavation of the ard marks at Wellhill is a very significant discovery that suggests a farming economy had taken hold in this location only a few generations after farming began in Britain around 4000BC. This is an amazing insight into the lives of Scotland’s first farmers.” Additional radiocarbon dating of the pit sites shows that they may actually date back even further, into the eighth millennium BCE, meaning they’re providing evidence of the very first Mesolithic events in the lowlands of Kinross and Perth. Dr. Rebecca Jones, with Historic Environment Scotland, is quoted in The Courier as saying, “These are very significant discoveries for archaeology in Scotland and even further afield, which is thanks mainly to the endeavors of the principle excavator, Dr. Dene Wright, who recognized the potential of these astonishingly early settlements, which were then confirmed via radiocarbon dating.” Historic Environment Scotland is a public body that was established to investigate, preserve and promote Scotland’s historic monuments and structures. They are responsible for approximately 300 historically significant properties, including Edinburgh Castle. In total, these sites receive over 3 million visitors annually. The organization is also responsible for a variety of collections, including over 5 million drawings, manuscripts, and photographs, in addition to 20 million aerial images of sites around the world. The SERF project has received an archaeology grant from Historic Environment Scotland to complete excavation, geophysical surveys, reporting and archival research. ]]>

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Place of King Harold’s Death Moved 20 Feet