«We see that they came from a similar volcanic source,» he added. (redorbit.com)
Since then it has been found that nearly 3 million volcanic sources exist. (wattsupwiththat.com)
Hunting for habitable exoplanets now may be easier: Cornell University astronomers report that hydrogen pouring from volcanic sources on planets throughout the universe could improve the chances of locating life in the cosmos. (carlsaganinstitute.org)