1792 – Born on the 17th of February in Piep Estonia.
1810 – He starts his medical studies at the University of Dorpat in Estonia.
1814 – Finished his medical studies and continues his studying at Vienna and he studied comparative anatomy at the University of Würzburg.
1819 – Prosecutor in anatomy at the University of Königsberg and he was appointed associate professor of zoology.
1822 – Reached the rank of a Professor. He discovered the mammalian egg (ovum) in the ovary, and the notochord (embryo backbone), and formulated the ‘biogenetic law’ that in embryonic development general characters appear before special ones.
1827 – Completed research "Ovi Mammalium et Hominis genesi" for Saint-Petersburg’s Academy of Science.
1834 – Baer left Germany to take up the position of librarian of the Academy of Science at St. Petersburg.
1837 – He led a scientific expedition into Arctic regions.
1851-1856 – Studied Russian fisheries and suggested many improvements.
1876 – Retired to his native Estonia and died on 28th of November in Dorpat.