Analyzing weather surveillance radar data in June and July 2019, Tielens and colleagues found that some 45 million grasshoppers a biblical plague took flight during the peak time, concentrating over city lighting such as the Las Vegas strip. The researchers also found daily movement cycles of ascent at dusk toward lit urban areas.
This study is novel, Tielens said, because the effects of artificial lights at night on insects at large scales have not been documented in a quantitative way. It shows how insects are interacting with the landscape, including with human-made environments. Since people continue to influence the environment, it s important to understand the effects of artificial light on insect populations, the researchers said. The knowledge can help scientists conserve the diverse world of insects, as well as manage important pest species.
美情報單位：技術領域 中國對美威脅嚴峻 - 焦點新聞
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Study cements age and location of hotly debated skull from early human Homo erectus
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Scott Gates as Director of the Centre for the Study of Civil War (CSCW) in 2009. Photo: Marit Moe-Pryce / PRIO
‘Strong critical theory doesn’t play a big role in peace science anymore, or even in peace studies’, states American political scientist Scott Gates in this conversation with his long-term collaborator Nils Petter Gleditsch. Scott calls for more and better recording of data disaggregated in time and space; more work that takes advantage of quasi-experimental designs and other methods through which we can better ascertain causal inference; and further use of data from social media to better appreciate such phenomena as the relationship between social media use and protest activities.