Many of the world’s biggest earthquakes, volcanic eruptions and tsunamis occur along a chain of seismologically active regions that encircle the Pacific Ocean.
The 8.7-magnitude earthquake off Russia’s coast led to warnings and advisories for parts of Japan and Alaska. Officials in Hawaii told people to expect destructive waves.
New observations fail to confirm signs of life in the atmosphere of the distant planet K2-18b. They also raise questions about what it will take to detect biology light-years away.
An artist’s impression of the exoplanet K2-18b. A new study confirms that it is a water-rich world but raises doubts about earlier suggestions that it harbors life.
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