December 23: edit
- 1833 - The HMS Beagle, carrying Charles Darwin on its second voyage, arrived at Puerto Deseado, Argentina.
- 1903 - Walter Drawbridge Crick died.
- 1908 - Perceval de Loriol died in Cologny, Switzerland.
- 1933 - Anthony Hallam was born in Leicester, England.
- 1938 - Armand de Ricqlès was born in Brussels, Belgium.
- 2001 - Vladimir Zherikhin died at age 56.
- 2003 - Stanley John Olsen died.
A New Leptoceratopsid (Ornithischia, Ceratopsia) with a Unique Ischium from the Upper Cretaceous of Shandong Province, China
Yiming He, Peter J. Makovicky, Kebai Wang, Shuqing Chen, Corwin Sullivan, Fenglu Han, Xing Xu
published 23 Dec 2015