moresensefortheenvironmentthanfossilfuels. Studycoauthorand HarvardUniversityscientist ProfessorDavidKeitharguedthat,whenitcomes toenergy production,thereis no freelunch. “Windbeatscoalbyanyenvironmentalmeasure, butthatdoesn?tmeanthatitseffectscanbeignored.Wemustusefewerfossilfuelstostopcarbon production.In doing...
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54,55,56). While the fossil record for early eukaryotes is sparse and difficult to distinguish from prokaryotes, there is evidence for early eukaryotes in non-marine or low-salinity environments from at least 1 billion years ago55. Furthermore, other key early eukaryotic innovations, such ...
The fossil record shows that many species have endured for millions of years - so why shouldn't we? Take a broader look at our species' place in the universe, and it becomes clear that we have an excellent chance of surviving for tens, if not hundreds, of thousands of years . Look up...
A key question in studies of mass extinctions is whether the extinction was a sudden or gradual event. This question may be addressed by examining the locations of fossil occurrences in a stratigraphic section. However, the fossil record can be consistent with both sudden and gradual extinctions....
Extinct but already fully marine cetaceans are known from the fossil record. ■(A)How was the gap between a walking mammal and a swimming whale bridged? ■(B)This is a question that has puzzled scientists for ages. Missing until recently were fossils clearly intermediate, or transitional, bet...
QUESTION 3 Choice C is the best answer because it most logically and precisely completes the text's discussion of the fossil record from the Cambrian period. In this context, "abrupt" means sudden. The text explains that the fossil record reflects the unexpected appearance and rapid ...
Paragraph 1:It has long been recognized that the dinosaurs disappeared from the fossil record at the end of the Cretaceous period (65 million years ago), and as more knowledge has been gained, we have learned that many other organisms disappeared at about the same time. The microscopic plankto...
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The possibility to obtain records millions of years old is particularly pertinent in Africa given the wealth and antiquity of the fossil and archaeological record of human evolution. U-Pb dated speleothems from early hominin bearing caves sites, in areas such as the Cradle of Humankind in South ...