Trees are outstanding historians. In fact, scientists dating back to Leonardo da Vinci recognized the value of trees. While others had figured out that you could determine the age of a tree by counting its growth rings, da ...
Environment
Apr 4, 2011
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A jointly developed interactive map launched this month by the University of Michigan's Graham Sustainability Institute and Headwaters Economics gives Great Lakes policymakers and decision-makers easy access to targeted data ...
Environment
Aug 14, 2013
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The concentration levels of nitrogen dioxide, a primary air contaminant, have declined 64% in major Spanish cities after the implementation of measures to fight COVID-19. Levels have fallen most in Barcelona, with an 83% ...
Environment
Mar 25, 2020
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Astronomers from India have conducted a long-term photometric variability survey of an open cluster known as NGC 559. As a result, they detected 70 new variable stars in the field of this cluster. The finding is presented ...
Cataclysmic variable stars (CVs) are white dwarf stars that are accreting from an orbiting, low mass binary companion star. The accretion is facilitated by the proximity of the stars; typical orbital periods range from about ...
Astronomy
Apr 9, 2018
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165
You've probably heard a lot about La Niña lately. This cool weather pattern is the main driver of heavy rain and flooding that has devastated much of Australia's southeast in recent months.
Earth Sciences
Nov 16, 2022
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193
An international team of astronomers has performed a long-term multiwavelength study of a distant gamma-ray emitting blazar known as 1ES 0647+250. Results of the research, published November 23 on arXiv.org, yield important ...
Using three ground-based telescopes, astronomers have conducted a long-term photometric monitoring of the Sh 2-170 star-forming region. The new observations have identified 71 variable stars in this region and provided essential ...
(Phys.org)—Located some 87,000 light years away, a dense globular cluster named Messier 54 (also known as NGC 6715) is a real gold mine for astronomers. Recently, an international team has discovered dozens of new variable ...
Scientists have filled a gaping hole in the world's climate records by reconstructing 600 years of soil-moisture swings across southern and central South America. Along with documenting the mechanisms behind natural changes, ...
Earth Sciences
Jul 7, 2020
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