Charles Darwin in his evolutionary tree
Charles Darwin in his evolutionary tree. Caricature of the British naturalist Charles Robert Darwin (1809-1882) sitting in his 'evolutionary tree'. Darwin studied the differences in closely related but geographically separated species. The evolutionary tree was the notion that all living things are related and, as different species have evolved from common ancestors, new 'branches' of the tree occur. This notion was first illustrated and popularised in The Origin of Species (1859), which also discussed 'natural selection', the notion that variations in species form arose over time, but only those variations which enhanced a species' chance of survival would be propagated.
© BILL SANDERSON/SCIENCE PHOTO LIBRARY
Members of the Search Party who found Captain Scott
From left: Sub-lieutenant Gran, Petty-Officer Williamson and Mr E.W. Nelson (biologist), members of the relief party who discovered the bodies of Captain Scott and his companions in the Antarctic Summer of 1912. They sighted Captain Scott's tent on November 12th, 1912, over seven months after the team's tragic death on their return from the South Pole. The men are more lightly clothed than might be expected as the Antarctic November is equivalent to a European June, and so they are wearing ski boots without any fur covering while Williamson is standing in his fur bed socks. Gran is handing out a ration of six biscuits, which are of special nutritive quality and very hard in texture.
© Mary Evans Picture Library 2015 - https://copyrighthub.org/s0/hub1/creation/maryevans/MaryEvansPictureID/10423064
Dr William Beebe, deep sea explorer, Bermuda
Dr William Beebe (1877-1962), American naturalist, ornithologist, marine biologist, entomologist, author and deep sea explorer, seen here in Bermuda, viewed from inside the Bathysphere porthole window made of quartz before his descent into the depths of the ocean. The Bathysphere was a spherical diving container. Date: 1932
© Mary Evans / Pharcide