In the arid deserts of Ethiopia, a geological marvel has been quietly unfolding since 2005—a 35-mile-long fissure known as ...

Leo P, a tiny galaxy, stopped making stars after the universe’s reionization. Unlike most galaxies, it restarted billions of ...

High radiation during a time of frenzied star formation in the Milky Way left one stellar population with few chances to form planets, a study reports.