Ruddiman WF (2005b) How did humans first alter global cli- mate? Scientific American 292: 46-53.Ruddiman, W. E. How did humans first alter global climate. Sci. Am. 2005, 292 (3), 46-53.RUDDIMAN, W.F., 2005, How did humans first alter global climate? Scientific American, 292, ...
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二、补全短文Humans today look very different from how they did hundreds of thousands of years ago.Human evolution(进化) has changed our bodies in many ways. 6 Will humans keep changing or have we reached the end of the line?The scientific name for humans is Homo sapiens(现代人类). Since ...
Humans today look very different from how they did hundreds of thousands of years ago. Human evolution(进化)has changed our bodies in many w 1 . But there's a question that still bothers scientists. Will humans keep evolving or have we reached the e 2 of the line? The scientific name f...
He could change his job. He should get the specific job. Maybe this would get something else instead. What he needs now is a job, not a place for wasting time. A motor is a short sentence or freedom to express the atoms beliefs and grading principles of a person. A group, an ...
Human migration is the idea that humans developed in Africa and then spread to Europe and Asia. Learn about human migration and how human migration works.
Over a year of darkness followed the 536 eruption of a volcano in Iceland. According toJohn of Ephesus, "The sun was dark and its darkness lasted for eighteen months; each day it shone for about four hours, and still this light was only a feeble shadow... the fruits did not ripen and...
Many believe it is foolish to try and predict(预知)the future of human evolution. For example, an extreme change in temperature, like the Ice Age(冰河时代), could mean humans have to 10 evolve more quickly to adapt. Otherwise, it could be thousands of years before we see any big ...
There is still much we do not know, and new fossils have the potential to change the story. Three new extinct hominins have been discovered in the past decade or so, includingAustralopithecus sedibaand the enigmatic and not yet well-datedHomo naledi, also in South Africa. Strangest of all ...
Most humans assume that we were always the ones in charge, lording over the rest of the animals. But Harari reminds us that long before we built the pyramids, wrote symphonies, or walked on the moon, there was nothing special about us. “The most important thing to know about prehistoric...