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Loss of top predators causing widespread ecosystem disruption

The decimation of “apex” predators such as wolves, cougars, lions or sharks has led to a huge increase in smaller “mesopredators” that are causing major economic and ecological disruptions, contends a new study in the journal Bioscience. The study found that in North America all of the largest terrestrial predators have been in decline for […]

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Cloud-seeding microorganisms go under the microscope




A new study is the first to yield direct data on how bacteria, fungal spores and plant material influence cloud formation at high altitudes. The researchers, led by Kimberly Prather and Kerri Pratt of the University of California at San Diego, sampled water droplet and ice crystal residues at high speeds while flying through clouds […]




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