Famous Explorers by Picture

Can you name these famous explorers and frontiersman based on a picture or portrait?
Click an image to see a larger version and for attribution
Quiz by HinesBrothers
Last updated: May 26, 2020
First submittedMay 5, 2020
Times taken34
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Level 70
May 5, 2020
Good quiz. A few "greats" that you might consider adding: Leif Erikson (if you can find an image), David Livingstone, Francisco Pizarro, John Hanning Speke, Vitus Bering, Fabian von Bellinghausen, James Clarke Ross and my hero - Ernest Shackleton.
Level 68
May 5, 2020
Thanks. I tried to find one for Leif Erikson, but there wasn't a good one on Wikipedia. The rest might be too obscure to be able to recognize a phot of.