folio 1.4.0

• Add the vegetation dataset (isotopic data).
• Document variable types for each dataset.

folio 1.3.0

• Add the loire dataset (count data).

folio 1.2.0

• Add the munsingen dataset (artefact data).
• Add the ngrip2010 dataset (palaeoclimates).
• Add the shipwrecks dataset (artefact data).

folio 1.1.0

• Add the verre dataset (chemical data).
• Add the ngrip2004 dataset (palaeoclimates).
• Add the stratigraphy dataset (chronological data).

folio 1.0.0

• Add the kommos dataset (chemical data).
• Add the chevelon dataset (count data).
• Add the law2006 and epica2008 datasets (palaeoclimates).
• Add the nydal1996 dataset (isotopic data).
• Add the arnold1949 dataset (historical radiocarbon dates; “Curve of Knowns”).
• Remove the altamira dataset.

folio 0.1.0

• Add the altamira, birds, boves, compiegne, merzbach, mississippi and zuni datasets (count data).
• Add the intcal09, intcal13 and intcal20 datasets (radiocarbon calibration curves).
• Add the lisiecki2005 and spratt2016 datasets (isotopic data).