Science Daily News

• Ancient genomes suggest woolly rhinos went extinct due to climate change, not overhunting August 13, 2020
  Although overhunting led to the demise of some prehistoric megafauna after the last ice age, a new study found that the extinction of the woolly rhinoceros may have been caused by climate change. By sequencing ancient DNA from 14 woolly rhinos, researchers found that their population remained stable and diverse until only a few thousand […]
• 'Black dwarf supernova': Physicist calculates when the last supernova ever will happen August 12, 2020
  New theoretical research finds that many white dwarfs may explode in supernova in the distant far future, long after everything else in the universe has died and gone quiet.
• Inexpensive, accessible device provides visual proof that masks block droplets August 11, 2020
  In a proof-of-concept study, researchers report that a simple, low-cost technique provided visual proof that face masks are effective in reducing droplet emissions during normal wear. They found that the best face coverings were N95 masks without valves -- the hospital-grade coverings that are used by front-line health care workers. Surgical or polypropylene masks also […]
• Mystery solved: Bright areas on Ceres come from salty water below August 11, 2020
  Data from NASA's recent Dawn mission answers two long-unresolved questions: Is there liquid inside Ceres, and how long ago was the dwarf planet geologically active?
• Past evidence supports complete loss of Arctic sea-ice by 2035 August 10, 2020
  A new study supports predictions that the Arctic could be free of sea ice by 2035.