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Humans have wiped life from the tidal flats of the Colorado River delta by diverting the river's water. But some environmental restoration is possible, says UA geoscientist Karl Flessa.
The UA Spacewatch Project team may have discovered an object brighter than all known Trans-Neptunian Objects except Pluto.
Lunar meteorite ages present strong, new evidence for the 'lunar cataclysm,' a 20-to-200 million year episode of intense bombardment of the moon and Earth at 3.9 billion years ago -- when the first evidence of life appeared on Earth, UA scientists report in the Dec. 1 issue of Science.
Bt cotton is still effective against pink bollworm, according to a UA study published in the November 21 issue of the Proceedings of the National Academy of Sciences. The estimated frequency of resistance pink bollworm to Bt cotton did not increase from 1997 to 1999.
Two short movie clips of Jupiter based on images taken by NASA's Cassini spacecraft show dynamic clouds in action on the giant planet.
University of Arizona astronomers will head two of six science teams that have won millions of dollars and thousands of hours observing time on the Space Infrared Telescope Facility (SIRTF) to be launched July 2002, NASA announced today.
Climate researchers who have mapped year-to-year global temperatures for the past few centuries find that greenhouse gases contribute to the recent temperature rise.
The UA's supercomputer, known as "Super," has just been ranked among the most powerful computers on the planet. Ranked 16th among 20 U.S. university high performance machines listed, Super will give UA students and faculty the competitive edge when it comes to winning research grants.
Global warming could disrupt the plan by some prominent ecologists to save species by conserving "hotspots" of biodiversity, warns Jonathan Overpeck, director of the UA's Institute for the Study of Planet Earth.
University of Arizona scientists will be leaving tonight (Nov. 15) for Vandenberg Air Force Base, Calif., to witness the launch of the Earth Observing (EO-1) satellite Saturday morning, Nov. 18. Their experiments are in the payload.