Newslink: The Closest Exoplanet to Earth Could Be 'Highly Habitable'
A global, liquid-water ocean could exist under range of conditions on Proxima Centauri b, the closest known exoplanet to Earth.
https://www.space.com/41806-proxima-b-nearest-exoplanet-habitable.html
The published paper is here.
The free preprint is here.