Lots of must-read stuff in today’s issue of Nature Geoscience, including a correspondence on “Biogenicity of Apex Chert microfossils.
3… There’s also a letter on the origins of Titan’s atmosphere, in which the authors claim the source of N2 in the impacts. They make these claims based on impact simulations that show NH4 could have been converted to N2.
2… Another Nature Geosciences letter, this one on potential false positives in the search for the earliest life on Earth. This work relates to apatite-associated graphite with low carbon isotope ratios. These pieces of evidence have been used before in the search for