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Trump Calls for World Action Against North Korea, Iran, Venezuela

U.S. President Donald Trump called Tuesday for a “great reawakening” of independent sovereign nations, but told world leaders at the United Nations they must collectively confront the rogue leaders of North Korea, Iran and Venezuela. He told the opening session of the U.N. General Assembly that the U.S. “will have no choice but to totally destroy” North Korea if it is forced to defend itself and American allies from a Pyongyang nuclear or ballistic missile attack. The U.S. leader mocked North Korean leader Kim Jong Un, saying, “Rocket man is…

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[Perspective] Watching speciation in action

Charles Darwin closed his first edition of On the Origin of Species with the poetic words: “There is grandeur in this view of life,…whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved” (1). Today, scientists are using genetics to understand how species multiply, and ecological and behavioral knowledge to understand why they do so. However, many questions remain about the sources of genetic variation and how new…

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