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Carbon dioxide in Earth's atmosphere was more than double its present level during the last Ice Age, UA and British scientists have discovered in evidence from a stalagmite recovered from the Bahamas. They report in Science what must have happened to produce excessive CO2.
Unless people develop strategies to share the human geographical range with wild animal species, more species will be driven like the dodo and blue pike to extinction, says UA Professor Michael Rosenzweig. Current ecological conservation efforts won't save endangered species, but reconciliation ecology could, he reports.
University of Arizona Regents' Professor J. Randolph Jokipii of the Lunar and Planetary Laboratory has been elected to the National Academy of Sciences, one of the most prestigious honors in American science.
May is National Better Hearing and Speech Month - and Arizona can proudly claim one of the top speech and hearing sciences departments in the nation.
The National Science Foundation (NSF) has decided not to provide to the University of Arizona and the University of Massachusetts the funds they requested to continue operations at the 12-meter radio telescope on Kitt Peak, Ariz., despite proposal reviewers who agreed unanimously on the importance of the telescope to U.S. astronomy.
The idea that what humans witnessed and chronicled in 1178 A.D. was a major meteor impact that created the 22-kilometer (14-mile) lunar crater called Giordano Bruno is myth, a University of Arizona graduate student has discovered. It should be welcome news for those worried by Deep Impact movie scenarios.
Long interested in improving the quality of science education, Sam Ward, UA professor in molecular and cellular biology (MCB), has been appointed editor-in-chief of a soon-to-be launched online journal promoting science education.
The UA College of Agriculture and Life Sciences offers resources and information on foot and mouth disease.
The laws that govern the attributes of organisms as they change in size applies to forests across the globe in a very predictable and regular way, UA's Brian Enquist reports in the April 5 Nature. (Don't let the word "allometry" scare you - this is fascinating stuff!)
What scientists suspect might be ancient ocean shorelines on the northern plains of Mars is actually a network of tectonic ridges related to dramatic martian volcanism, a University of Arizona planetary sciences graduate student and a collaborating post-doctoral researcher at the Massachusetts Institute of Technology report April 5 in Nature.
