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A Conversation With… Dr. Goodall, who is best known for her work with chimpanzees, recently celebrated her forthcoming 90th birthday with as many dogs and explained why she isn't slowing down. By Darren Incorvaia Trilobites Researchers examined fossils of the predatory worm and found a new species that persisted for 25 million years after it was believed to have become extinct. By Jack Tamisiea A new study suggests that two killer whale populations in the North Pacific are distinct enough to be considered separate species. By Emily Anthes Essay What new research on the avian brain and REM sleep in birds might reveal about our own dream lives. By Maria Popova Bird Flu Spreads to Dairy Cows U.S. regulators confirmed that sick cattle in Texas, Kansas and possibly in New Mexico contracted avian influenza. They stressed that the nation's milk supply is safe. By Emily Anthes Out There Life After Asteroid Bennu Dante Lauretta, the planetary scientist who led the OSIRIS-REx mission to retrieve a handful of space dust, discusses his next final frontier. By Katrina Miller A Conversation With Tras la pista de los denisovanos El ADN ha demostrado que esos humanos ya extintos se extendieron por todo el mundo, desde la fría Siberia hasta el Tíbet, a una gran altitud, quizá incluso en las islas del Pacífico. By Carl Zimmer On the Trail of the Denisovans DNA has shown that the extinct humans thrived around the world, from chilly Siberia to high-altitude Tibet — perhaps even in the Pacific islands. By Carl Zimmer How do champion skaters accomplish their extraordinary jumps and spins? Brain science is uncovering clues. By Pam Belluck Several justices questioned the remedy of applying nationwide restrictions to mifepristone because it would be the first time a court had second-guessed the F.D.A.'s expert judgment on a drug. By Pam BelluckHighlights
Jane Goodall Is More of a Dog Person, Actually
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