Unit 57Past performance is not an indicator of future returns. That, at least, is the advice given to investors.... [查看全文]
Unit 56According to the new research appearing in the July 26 issue of The New England Journal of Medicine, obe... [查看全文]
Unit 55Altruism, according to the text books, has two forms. One is known technically as kin selection, and fami... [查看全文]
Unit 54A dog may be man’s best friend. But man is not always a dog’s. Over the centuries selective breeding ... [查看全文]
Unit 53Nobody ever went into academia to make a fast buck. Professors, especially those in medical-and technology-... [查看全文]
Unit 52Bryant Linares has one heck of a secret family recipe: how to make world-class diamonds. Seven years ago... [查看全文]
Unit 51Nouabalé-Ndoki national park, in the Republic of Congo, is 4,200 square kilometres of virgin tropical fore... [查看全文]
Unit 50① The once radical notion that birds descended from dinosaurs—or may even be dinosaurs, the only living... [查看全文]
Unit 49Windsurfers in Hawaii might not seem to have much in common with the geeks who these days tinker with L... [查看全文]
Unit 48In 1966 Allen and Beatrice Gardner, two psychologists at the University of Nevada in Reno, had a bright ... [查看全文]