Chattanooga's airport is now 100% solar powered

The solar farm is expected to save the airport millions over the following decades.

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  • Tennessee's Chattanooga Metropolitan Airport recently completed construction of a 2.74-megawatt solar farm.
  • The system includes battery storage that enables it to continue operating without constant sunlight.
  • Airport officials hope it will serve as a model to other airports.
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Mysterious radiation leak, 100x larger than Fukushima disaster, traced to Russian facility

Russia's state-owned nuclear corporation Rosatom denies the allegations.

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  • The nuclear leak occurred in 2017 and was recorded by scientists in multiple European countries.
  • No nation or organization has ever claimed responsibility for the leak, which, while massive, is not believed to have harmed anyone.
  • The new study used more than 1,300 measurements to trace the likely source of the leak to the Urals region of Russia, where lies the Mayak nuclear complex.
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The invention that made us human: Fire

Did fire change the development of the human brain?

  • The earliest evidence for fire dates back nearly 440 million years.
  • Our hominin ancestors first used natural wildfires to flush out prey and forage for food.
  • Richard Wrangham's cooking hypothesis suggests that a ready supply of cooked food allowed the Homo lineage to develop its large, complex brains.
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For first time, U.S. renewable energies surpass coal

In April, the U.S. generated more electricity from renewables — hydro, wind, solar, geothermal, and biomass — than coal.

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  • Wind and solar saw the biggest increases in April.
  • Spring is when coal-generated electricity is typically lowest, and when hydro-generated electricity is highest.
  • American coal-fired power plants are shutting down at record rates, putting thousands of jobs at risk.
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Scientists want to use bacteria to revolutionize energy storage

Cornell University researchers propose using biology to transform the storage of sustainable energy.

  • Scientists from Cornell University suggest using biology to transform sustainable energy storage.
  • The researchers propose combining biological and non-biological electrochemical engineering to improve on photosynthesis.
  • Using electroactive microbes can produce biofuels.
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