Asteroid Strikes May Have Frozen Past Earth Into 'Snowball,' Study Argues
By blotting out the sun with dust clouds, an impact on an already chilly Earth could set off runaway cooling, models suggest.
Source: newsweek.com
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By blotting out the sun with dust clouds, an impact on an already chilly Earth could set off runaway cooling, models suggest.
The scissor-tailed flycatcher was spotted flying around the Cambridge Butterfly Conservatory last week. It was the first local sighting of the bird in over 30 years.