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Cumulative number of publications reporting the use of molecular data to estimate species divergence times; redrawn from Hedges et al. (2015). This graph is a representative trend for the growth of the corpus of peer-reviewed literature available. Inset shows the growth of sequence databanks since 1982. Number of bases in each release of GenBank are shown (data from http://ftp://ftp.ncbi.nih.gov/genbank/gbrel.txt).
