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Sci-tech

  • Hubble identifies unusual wrinkle in expansion rate of the universe

    Measuring the expansion rate of the universe was one of the Hubble Space Telescope's main goals when it was launched in 1990. Over the past 30 years, the space observatory has helped scientists discover and refine that accelerating rate -- as well as uncover a mysterious wrinkle that only brand-new physics may solve.

    A collection of images from the NASA/ESA Hubble Space Telescope features galaxies that are all hosts to both Cepheid variables and supernovae. (Source: NASA / ESA / Adam G. Riess (STScI, JHU) via CNN)

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Climate and Environment

G7 pledges put coal on notice, could boost climate aid

Officials from the Group of Seven wealthy nations announced Friday that they will aim to largely end greenhouse gas emissions from their power sectors by 2035, making it highly unlikely that those countries will burn coal for electricity beyond that date.

Robert Habeck, Federal Minister for Economic Affairs and Climate Protection, and Steffi Lemke , Federal Minister for the Environment, Nature Conservation, Nuclear Safety and Consumer Protection, open the meeting of the G7 Ministers for Climate, Energy and the Environment in Berlin, Germany, Thursday, May 26, 2022. (Kay Nietfeld/dpa via AP)