Confirmed: A duck named Ripper learned how to say “You bloody fool!” – "At first I thought, 'It's a hoax, it can't be true.' But it turned out to be true."

Source: Carel ten Cate, Peter J. Fullagar. Vocal imitations and production learning by Australian musk ducks ( Biziura lobata ). Philosophical Transactions of the Royal Society B: Biological Sciences, 2021.

Ancient solar storm proves Vikings lived in Newfoundland by at least AD 1021, scientists say – Norse legends and archeological evidence had scientists guessing when the Vikings erected a thousand-year-old settlement in Newfoundland. But the discovery of an ancient solar storm offers new evidence, nailing down the exact year they lived there.

Source: Margot Kuitems, et al. Evidence for European presence in the Americas in ad 1021. Nature, 2021.

Disturbing Answers to the Mystery of Tuskless Female Elephants – Poaching brings evolutionary pressure for tusklessness

Source: Chris T. Darimont, Fanie Pelletier. Of war, tusks, and genes. Science, 2021.

Watch this wooden knife cut effortlessly through juicy, medium-well-done steak – Also: A hardened wood nail performed as well as its stainless steel counterpart.

Source: Bo Chen, et al. Hardened wood as a renewable alternative to steel and plastic. Matter, 2021.

Origins of domesticated horses traced to north Caucasus region, study finds – Horses were first domesticated in the northern Caucasus region, before conquering the rest of Europe and Asia within a few centuries, according to research published Wednesday by the journal Nature.

Source: Pablo Librado, et al. The origins and spread of domestic horses from the Western Eurasian steppes. Nature, 2021.

Martian floods? Scientists say rover found evidence – NASA's Perseverance rover discovered evidence that the Jezero crater on Mars it touched down in was once a lake bed fed by a river with floods, scientists say.

Source: Perseverance rover reveals an ancient delta-lake system and flood deposits at Jezero crater, Mars. Science, .

A planet 6,000 light years from Earth reveals how the end of our solar system will look – A darkened planet circling the feeble remnant of a burned-out star about 6,000 light-years from Earth shows what our own solar system will look like at the end.

Source: J. W. Blackman, et al. A Jovian analogue orbiting a white dwarf star. Nature, 2021.

Covid-19 news: Pfizer trial finds booster vaccine over 95% effective – The latest coronavirus news updated every day including coronavirus cases, the latest news, features and interviews from New Scientist and essential information about the covid-19 pandemic

Source: Ben Y. Reis, et al. Effectiveness of BNT162b2 Vaccine against Delta Variant in Adolescents. New England Journal of Medicine, 2021.

Amazing 100-million-year-old crab found perfectly preserved in amber – The pristine fossil fills huge gaps in the fossil record, explaining how early crabs left the ocean for land.

Source: Javier Luque, et al. Crab in amber reveals an early colonization of nonmarine environments during the Cretaceous. Science Advances, 2021.