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ScienceDaily: Earth & Climate News |
| Young female black bears in Asheville, North Carolina, are big, have cubs early Posted: 09 Sep 2021 01:22 PM PDT Black bears (Ursus americanus) reproduced at a younger age in urban areas and were nearly twice the size of bears in national forests shortly after their first birthdays. |
| Scientists solve mystery of icy plumes that may foretell deadly supercell storms Posted: 09 Sep 2021 11:12 AM PDT The most devastating tornadoes are often preceded by a cloudy plume of ice and water vapor billowing above a severe thunderstorm. New research reveals the mechanism for these plumes could be tied to 'hydraulic jumps' -- a phenomenon Leonardo Da Vinci observed more than 500 years ago. |
| Ancient sea ice core sheds light on modern climate change Posted: 09 Sep 2021 09:42 AM PDT A 170 m record of marine sediment cores extracted from Adélie Land in Antarctica is yielding new insights into the complicated relationship between sea ice and climate change. |
| Moth wingtips an ‘acoustic decoy’ to thwart bat attack Posted: 09 Sep 2021 09:42 AM PDT Wingtips of certain species of silkmoth are structured to reflect sound and throw off attackers, according to a new study. |
| Ancient marsupial 'junk DNA' might be useful after all, scientists say Posted: 09 Sep 2021 09:40 AM PDT Viral fossils buried in DNA may protect against future virus infections, a new marsupial study suggests. |
| Large herbivore can reduce fire risks Posted: 09 Sep 2021 09:40 AM PDT The use of large herbivores can be an effective means to prevent and mitigate wildfires, especially in places facing land abandonment. They can replace much more costly solutions like firefighting or mechanical vegetation removal. |
| Sunlight can break down marine plastic into tens of thousands of chemical compounds, study finds Posted: 08 Sep 2021 03:07 PM PDT Sunlight was once thought to only fragment plastics in the marine environment into smaller particles that chemically resemble the original material and persist forever. However, scientists more recently have learned that sunlight also chemically transforms plastic into a suite of polymer-, dissolved-, and gas-phased products. |
| Study reveals dramatic impact of climate change in the Sierra Nevada Posted: 08 Sep 2021 03:06 PM PDT The new study reveals just how dramatically climate change has impacted aquatic ecosystems in the Sierra Nevada. Scientists can use the data to anticipate changes coming in the near future, and how those changes might influence water availability. |
| Posted: 08 Sep 2021 03:06 PM PDT Before humans made their way to New Zealand, the critically endangered flightless parrot known as the k?k?p? likely numbered in the hundreds of thousands. By 1995, their numbers had dwindled to just 51 birds, including 50 isolated on tiny Stewart Island and a single male, known as Richard Henry, all alone on the mainland. Today, those numbers have grown to about 200 individuals. Now, the first genome sequencing of the species offer some surprisingly good news: despite 10,000 years of island isolation and inbreeding, the k?k?p? appear to have lost potentially deleterious mutations rather than accumulating them. In fact, they now carry fewer deleterious mutations than now-extinct populations on the mainland once did. |
| ‘MRI’ scan reveals spectacular ice age landscapes beneath the North Sea Posted: 08 Sep 2021 03:05 PM PDT Spectacular ice age landscapes beneath the North Sea have been discovered using 3D seismic reflection technology. Similar to MRI (magnetic resonance imaging) the images reveal in unprecedented detail huge seafloor channels - each one 10 times wider than the River Thames. |
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