- 1923 - Gustav Karl Laube died in Prague, Czech Republic.
- 1996 - Gunnar Henningsmoen died.
- 2012 - Raymond Thorsteinsson died in Calgary, Alberta, Canada at age 91.
Imperfect Isolation: Factors and Filters Shaping Madagascar’s Extant Vertebrate Fauna
Karen E. Samonds, Laurie R. Godfrey, Jason R. Ali, Steven M. Goodman, Miguel Vences, Michael R. Sutherland, Mitchell T. Irwin, David W. Krause
published 23 Apr 2013