每日英文即兴演讲 Is technology making us more disconnected as humans? 03:49 每日英文即兴演讲 Take care of yourself 02:48 每日英文即兴演讲 If you could change one law in your country, what would it be and why? 03:57 每日英文即兴演讲 What is more important: creativity or knowledge? 03...
First Humans in the American Deserts After investigations by generations of scholars, the case of the prehistoric human adventure in the deserts of North America has emerged as a rich, if largely unresolved, detective story, complete with abundant and often puzzling clues, no living witnesses, and...
When Did Neanderthals and Modern Humans Divergedoi:10.1002/EVAN.10058Peter BeerliScott V. EdwardsWiley Subscription Services, Inc., A Wiley Company
Where did the first human come from? Humans first evolved inAfrica, and much of human evolution occurred on that continent. The fossils of early humans who lived between 6 and 2 million years ago come entirely from Africa. Most scientists currently recognize some 15 to 20 different species of...
Neanderthal gene flow has influenced genetic and phenotypic variation in modern humans, and Neanderthal ancestry segments have been identified across more than 300 genomes, supporting a model of a single major gene flow event. Natural selection for positive and negative traits occurred soon after the ...
This brings us to another question: by which route did modern humans move out of Africa? 这给我们带来了另一个问题: 现代人是通过哪条路线离开非洲的? No clear routes across the Mediterranean from North Africa appear to be...
Steffen, Crutzen, and McNeill, “The Anthropocene: Are Humans Now Overwhelming the Great Forces of Nature?.” 617. Jan Zalasiewicz, et al., “When Did the Anthropocene Begin? A Mid-Twentieth Century Boundary Level Is Stratigraphically Optimal,” Quaternary International, January 2015 (in pres...
When did the first modern amphibians arise? When did the first amphibians move to land? When did vertebrates, amphibians, reptiles and mammals first appear? When did reptiles, amphibians, mammals and humans first appear? When do amphibians develop gills? When do amphibians eggs hatch? Did reptile...
Why did the number of the elephants drop so quickly? On the one hand, the elephants’ main lake, their only water source (来源), dried up. On the other hand, the land which the elephants lived on was overused by humans. To protect the elephants’ living environment, the Mali Elephant ...
“Except the humans.” On day six we crossed the flats again and stopped at the abandoned train station at Caipe, where minerals taken out of the mountains left to be transported to Salta; the trains stopped running in 1979. The station wasn’t totally uninhabited though; we were greeted ...