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Reuters:French authorities have opened an investigation into an anonymous threat against Chinese national carrier Air China, a spokesman for the Paris prosecutor s office said on Tuesday. read the articlegt;
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Dinosaurs took on many different shapes and sizes, but paleontologists are learning their success had no
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stanley tumbler do with their iconically massive bodies. If anything, their evolutionary success would appear to have come from their longstanding ability to keep shrinking. Just ask the birds. Top image: Nebezial via Deviant Art. Shortly after the dinosaurs made their appearance some 220 million years ago, they rapidly evolved and spread out into many different forms. This mad dash to invade all viable ecological niches is what evolutionary biologists call adaptive radiation. Soon after this initial phase, however, dinosaur evolution 鈥?at least as far as body size evolution goes
stanley thermos 鈥?slowed down appreciably. Indeed, biologists have observed that rate of body size evolution slows down as lineages continue to diversify. Evolution is for the Birds Well, except for one particular line of dinosaurs 鈥?one that still around today, in the form of birds. According to an international team led by scientists at Oxford University and the Royal Ontario Museum, continually shrinking morphologies and persistent high rates of evolution may have helped the group that became birds to continue exploiting new ecological niches over the course of their evolutionary history. And this is what still allows them to be hugely successful even today. To reach this conclusion, the scientists estimated the body masses of 426 dinosaur species, based on the thickness of their leg bones. They then exami