Bullfrogs are bullying their way up the Yellow Stone River, invading the floodplains of Montana, according to a new study. And experts are saying that this may be one of the hardest invasions to fight.
The longest-operating Earth observing satellite, Landsat 5, will be deactivated after spending decades observing the changing planet and transmitting over 2.5 million images, the U.S. Geological Survey (USGS) announced last week.
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