![]() One clue is that sauropod (long-neck) dinosaurs went extinct at about the same time as did Siats. “It wasn't until carcharodontosaurs vacated these top predator roles in North America that tyrannosaurs were free to evolve into the giant predators we know and love today,” says Zanno.īut what did, in fact, happen to Siats? Well, paleontologists don’t yet know. rex that would control swaths of the Earth some 20 million years later. In the same rock beds that hold Siats’ big bones, the paleontologists also found teeth from diminutive tyrannosaurs no bigger than a large dog – tyrannosaurs not at all like the massive T. With something so big as Siats's stomping around, the tyrannosaurs had no chance at evolving into T. At that time, it would have succeeded Acrocanthosaurus as North America's apex predator. Siats, at some 98 million years old, presents a partial answer to that problem. If carcharodontosaurs had ended in North America with the Acrocanthosaurus some 110 million years ago, and tyrannosaurs had picked up the crown 65 million years ago, what had happened in the intermediate period? What dinosaur had been the mightiest dinosaur of them all? Had tyrannosaurs perhaps grown big and strong earlier than thought? Or had carcharodontosaurs held on for longer than paleontologists had known? Tyrannosaurs are also more related to birds than are carcharodontosaurs. Carcharodontosaurs, though, have more slender skulls and more substantial arms than do tyrannosaurs. ![]() ![]() Tyrannosaurs and carcharodontosaurs look similar: big bodies, big teeth, big skulls, and two legs. rex, emerged to preside over their terrorized territories. Later, when the carcharodontosaurs vanished, the tyrannosaurs, which include T. Siats is a carcharodontosaur, a group of humongous carnivores that had wielded their size over just about everything in their ecosystems all around the world during the late Jurassic period. ![]() rex’s bantam ancestors evolving into something big and strong, says Zanno. rex, which weighed twice as much as Siats and appeared not until 30 million or so years later.Īnd it took 30 million years because, so long as Siats was around, there was little chance of T. It’s possible that, at adult-size, Siats is the second largest carnivorous dinosaur ever known to roam North America, says Dr. And that’s just the size of a juvenile Siats the hind limb, pelvis, and backbone that the paleontologists found, in Utah’s Cedar Mountain Formation in 2008, is from a not yet full-grown dinosaur. Siats – full name, Siats meekerorum – was about 30 feet long. “Tyrannosaurs were living in the shadows.” “Siats is a giant,” says Lindsay Zanno, lead author on the paper and director of Paleontology at the North Carolina Museum of Natural Sciences. Not until this new dinosaur – called Siats, after the cannibalistic and man-eating monsters from Utah’s Ute tribe legends – disappeared from the planet could T. rex, the mightiest of all tyrant lizards. Paleontologists report this week in Nature Communications the find of a new gigantic, carnivorous dinosaur species that is believed to have for millions of years kept tyrannosaurs from evolving into T. It is simply common sense,” said the watchdog group Project on Government Oversight earlier this month. Justice Sonia Sotomayor has not recused herself from court cases involving publisher Penguin Random House, which has paid her millions in book royalties.“A demand for ethical constraints is not an attack on the Court or any single justice. That should change, say some experts, given the allegations against Justice Alito and recent revelations about gifts to Justice Clarence Thomas from billionaire Harlan Crow.This isn’t about attacking the court’s conservative majority, some insist. Singer had any interest in the cases before the court, he insisted.There’s been a code of conduct for federal court judges since 1973, but the Supreme Court isn’t bound by it. Singer’s hedge fund in a lawsuit that ultimately netted it $2.4 billion.Justice Alito has denied that he did anything wrong. In a prebuttal in The Wall Street Journal published prior to ProPublica’s release of the story – an unusual step – he said that the trip was personal hospitality, and thus he didn’t need to report it. In 2014, justices voted 7-1 in favor of Mr. That may have violated a federal law that requires justices to disclose most such gifts, according to the ProPublica story.Nor did Justice Alito recuse himself when cases involving businesses of the billionaire, Paul Singer, came before the court. ![]() Is it time for the Supreme Court to have a detailed, binding code of ethics?That’s a question sparked by the recent report from ProPublica that in 2008, Justice Samuel Alito took a luxury fishing trip to Alaska on a billionaire’s private jet.Justice Alito did not report the trip on his financial disclosure. ![]()
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