Alfred Russel WallaceAlfred Russel Wallace

08 January 1823

British

Richard Francis BurtonRichard Francis Burton

19 March 1821

British

Douglas MawsonDouglas Mawson

05 May 1882

Australian

Inge LehmannInge Lehmann

13 May 1888

Danish

Carl Ortwin Sauer Carl O. Sauer

24 December 1889

American

Sven HedinSven Hedin

19 February 1865

Swedish

William Morris DavisWilliam Morris Davis

12 February 1850

American

Nikolay PrzhevalskyNikolay Przhevalsky

12 April 1839

Russian

Ferdinand Freiherr von Richthofen Ferdinand von Richthofen

05 May 1833

German

Francisco MorenoFrancisco Moreno

31 May 1852

Argentinian

Ferdinand von MuellerFerdinand von Mueller

30 June 1825

Australian,German

Henry GannettHenry Gannett

24 August 1846

American

Continue Reading Below

Élisée ReclusElisee Reclus

15 March 1830

French

George EverestGeorge Everest

04 July 1790

British

Peter AufschnaiterPeter Aufschnaiter

02 November 1899

Nepalese

Friedrich RatzelFriedrich Ratzel

30 August 1844

German