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The 92-Year-Old Mathematician and the Teenage Apprentice
1+ week, 17+ hour ago (135+ words) Joan Birman thought her major discoveries were behind her....Joan Birman thought her major discoveries were behind her....
Eight of ten blue-throated macaws slid a feeder door upward after watching another macaw do it, and not one of the five tested without a demonstrator went that way on its own, though the researchers say the species is too rare for them to prove it was imitation
1+ week, 3+ day ago (439+ words) an eight-centimetre knob at its centre, and a transparent box of walnut pieces three centimetres behind...
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