February 23: edit
- 1835 - Henry Bowman Brady was born in Gateshead, England.
- 1975 - Anatol Heintz died in Bærum, Norway.
- 2015 - David K. Smith published a study of the skull and neck musculature of the North American therizinosaurs Falcarius utahenisis and Nothronychus mckinleyi.