Epic failures in science communication, versions 12,385,395 through 12,385,397:
The problems, of course, is that the meteorites in question were not reported to contain DNA at all. Instead they contained the nucleobases adenine and guanine, which are components of DNA in the same way that axles are a component of a car. Additionally, there were lots of other molecules, that look somewhat similar to the nucleobases found in DNA, and yet are found nowhere in DNA, like 6,8-diaminopurine.
On the other hand, NASA seems to be getting better at press releases, at least compared to the arsenic fiasco. Also, cyanophage S-2L is my new favorite virus.
I couldn’t find the relevant paper in PNAS yet, but here is an unrelated paper on the cool subject of the chemical diversity of meteorites.