Doubts over signs of alien life on exoplanet K2-18b are rising: 'This is evidence of the scientific process at work' / News at a glance: claimed exoplanet life signs, an advance in ultracold microscopy, and slashed funds for U.S. environmental research / Rare Exoplanet Orbits Two Stars at a Wild 90-Degree Angle / Scientists discover super-Earth exoplanets are more common in the universe than we thought / Possible signs of alien life found on nearby exoplanet, study reports / Scientists decipher mysterious atmosphere of 'Rosetta Stone' exoplanet / New sub-Neptune exoplanet orbiting nearby star detected / In the search for life on exoplanets, finding nothing is something too / 2 newly found exoplanets reignite an outstanding question about our solar system / Large alien planets may be born in chaos, NASA's retired exoplanet-hunter finds