Comet theory carbonized

Sediment studies rule out impact as cause of ancient cold spell.

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Daulton, T. L., Pinter, N. & Scott, A. C. Proc. Natl Acad. Sci. USA doi:10.1073/pnas.1003904107 (2010).
Scott, A. C. et al. Geophys. Res. Lett. doi:10.1029/2010GL043345 (2010).

Authors

Rex Dalton
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Dalton, R. Comet theory carbonized. Nature (2010). https://doi.org/10.1038/news.2010.441