Genetic Mutation Found In Peripheral Artery Disease

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Two Oxygenation Events In Ancient Oceans Sparked Spread Of Complex Life
The rise of oxygen and the oxidation of deep oceans between 635 and 551 million years ago may have had an impact on the increase and spread of the earliest complex life, including animals. Today, we take oxygen for granted. But the atmosphere had almost no oxygen until 2.5 billion years ago, and it was not until about 600 million years ago when the atmospheric oxygen level rose to a fraction of modern levels. For a long time, geologists and evolutionary biologists have speculated that the rise of the breathing gas and subsequent oxygenation of the deep oceans are intimately tied to the evolution of modern biological systems.

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Observing Sustainable Tourism In Antarctica
Antarctica is the ultimate destination for anyone interested in natural history but it also challenges those people who visit to think broadly about our responsibilities to all life on Earth, according to a professor who has just returned from the Antarctic in his role as an Observer for the International Association of Antarctica Tour Operators.

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Smoking Associated With Both Anxiety And Depression
A new study indicates that smoking is linked to anxiety with depression, as well as to anxiety alone. However, people who are depressed but not anxious smoke the same as any other smokers. These findings come from a joint study from Norwegian Institute of Public Health (NIPH), University of Bergen and King's College in London. The link between smoking and anxiety/depression was most apparent among women and young people. (Read More)

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