Alien Invasions Are Expensive

[ad_1] (Bloomberg Opinion) — An 8.5-millimeter striped beetle. A 4-millimeter mosquito. A 25-millimeter hornet. These critters are tiny, but they pack a mighty punch when it comes to economic costs. The damage these organisms and their ilk are inflicting on regions around the world puts invasive alien species —  non-native flora and fauna that harm the environments…

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How the last mammoths went extinct

[ad_1] The woolly mammoths of Wrangel island were survivors. Trapped on a hunk of rock in the Arctic Ocean after rising sea levels cut them off from present-day Siberia, they were the last of their species to go extinct. Palaeontology textbooks have explained their eventual demise around 4,000 years ago as a classic case of…

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