I'm impressed, that's a surprisingly good pop-sci-style article. The writing is clear, correct, accessible, and a nice summary of the scientific context for the paper in question. The original PNAS article is also clearly linked.

At least with geoscience, science journalists usually manage to get things horribly wrong. Judging from previous articles, Helen Thompson (the writer) looks like she might be a biologist instead of a geologist, but she nailed the subject matter, regardless.