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  1. The Japanese Hayabusa2 spacecraft touched down on asteroid Ryugu and attempted to gather a sample of its rock to bring back to Earth.
  2. A stream of particles created in a neutron star crash, detected in 2017 using gravitational waves, could explain certain mysterious flashes of light.
  3. New Ardipithecus ramidus fossils reveal how hominids were shifting toward humanlike walking more than 4 million years ago.
  4. Analyzing supernovas indicates that expansion rates agree within 1 percent across large regions of sky.
  5. New Yorkers’ levels of artificial trans fats dropped, especially in people who ate out the most, after a citywide ban on the fats in restaurant foods.
  6. Researchers rediscovered the world’s largest bee living in the forests of an island of Indonesia.
  7. New dating techniques for the Deccan Traps volcanic eruptions disagree on whether they were the main culprit in the dinosaurs’ demise.
  8. A newly found dinosaur called Moros intrepidus fills a hole in the evolutionary history of tyrannosaurs, helping narrow when the group sized up.
  9. Children from homes with all vinyl floors and flame-retardant sofas show higher levels of some synthetic chemicals in their bodies than other kids.
  10. Artificial intelligence that helps make scientific discoveries needs to get better at admitting its uncertainty, Genevera Allen says.
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