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Gustavo A. Ballen

Paleoichthyology, programming, data analysis, biogeography

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You can contact me either at gustavo.a.ballen (at) gmail or gustavo.ballen (at) unesp.br. Alternatively, you can also use the form below:

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“In examining things present, we have data from which to reason with regard to what has been; and, from what has actually been, we have data for concluding with regard to that which is to happen hereafter. Therefore, upon the supposition that the operations of nature are equable and steady, we find, in natural appearances, means for concluding a certain portion of time to have necessarily elapsed, in the production of those events of which we see the effects.”

James Hutton, 1788⁠.

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Recent Posts

Introduction to birth-death trees March 23, 2021
Constructing a list of valid species from Catalog of Fishes 2: The R approach December 11, 2020
An anonymous duet for the lute December 2, 2020
Prelude by Hans Gerle for the Lute September 30, 2020
Constructing a list of valid species from Catalog of Fishes 1: The Emacs approach September 30, 2020

Gustavo A. Ballen,

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