Template:Selected anniversaries/May 6: Difference between revisions

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File:Penny Black.jpg|link=Penny Black (nonfiction)|1840: The [[Penny Black (nonfiction)|Penny Black postage stamp]] becomes valid for use in the United Kingdom of Great Britain and Ireland.
File:Penny Black.jpg|link=Penny Black (nonfiction)|1840: The [[Penny Black (nonfiction)|Penny Black postage stamp]] becomes valid for use in the United Kingdom of Great Britain and Ireland.


||1843: Grove Karl Gilbert born ... geologist and academic ... geomorphology, planetary science
||1843: Grove Karl Gilbert born ... geologist and academic ... geomorphology, planetary science. Gilbert is considered one of the giants of the sub-discipline of geomorphology, having contributed to the understanding of landscape evolution, erosion, river incision and sedimentation. Gilbert was a planetary science pioneer, correctly identifying lunar craters as caused by impacts, and carrying out early impact-cratering experiments.[6] He coined the term sculpture for a pattern of radial ridges surrounding Mare Imbrium on the moon, and correctly interpreted them in 1893 as ejecta from a giant impact. Pic.


||1848: Henry Edward Armstrong born ... chemist and academic.
||1848: Henry Edward Armstrong born ... chemist and academic.

Revision as of 07:39, 6 May 2019