#OTD in 1835, Charles Darwin took his last steps on Galapagos lava (sketch by him of superimposed lava-flows) https://t.co/qT8PTBlFkv http://pic.twitter.com/fUCI4XJYnG
— David Bressan (@David_Bressan) October 18, 2016
via Twitter https://twitter.com/David_Bressan
October 18, 2016 at 02:11PM
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