What is Karl Ernst von Baer?
{{Use dmy dates|date=July 2013}} {{Infobox scientist | name = Karl Ernst von Baer | image =Voyages_de_la_Commission_scientifique_du_Nord,_en_Scandinavie,_en_Laponie,_au_Spitzberg_et_aux_Feröe_-_no-nb_digibok_2009040211001-118.jpg | image_size = 225px | alt = | caption = | birth_date = {{Birth date|1792|2|17|df=y}} | birth_place = [[Piep]] estate, [[Estonia]], [[Russian Empire]] | death_date = {{Death date and age|1876|11|16|1792|2|17|df=y}} | death_place = [[Dorpat]], Russian Empire | residence = | citizenship = [[Russian Empire]] | nationality = [[Estonians|Estonian]]<ref name=reproduction>{{cite journal |url=http://www.reproduction-online.org/content/62/1/1.full.pdf+html |title=An historical look at embryo transfer |author=K. J. Betteridge |journal=Reproduction. The Journal of the Society for Reproduction and Fertility |quote=Three years later, the Estonian, Karl Ernst von Baer, finally found the true mammalian egg in a pet dog (von Baer, 1827). |year=1981 |volume=62 |issue=1 |pages=1–13 |doi=10.1530/jrf.0.0620001 |pmid=7014855 |s2cid=33779912 |access-date=2016-12-18 |archive-date=2015-09-24 |archive-url=https://web.archive.org/web/20150924090529/http://www.reproduction-online.org/content/62/1/1.full.pdf+html |url-status=dead }}</ref><ref name=repro>{{cite journal |url=http://hektoeninternational.org/HektoenInternational.NeuralDarwinism2.html |title=Evolution from recapitulation theory to Neural Darwinism |author=J.M.S. Pearce, M.D. |journal=Hektoen International. A Journal of Medical Humanities |volume=2 |issue=2 |year=2010 |access-date=2016-12-18 |archive-date=2012-03-29 |archive-url=https://web.archive.org/web/20120329104606/http://hektoeninternational.org/HektoenInternational.NeuralDarwinism2.html |url-status=dead }}</ref> | fields = [[Biology]], [[embryology]], [[geology]], [[meteorology]], [[geography]] | workplaces = Imperial University of Dorpat, [[University of Königsberg]], [[Russ