Caption: Scottish physicist William Thomson, Lord Kelvin (1824--1907)---another furry 19th century scientist.

He invented the original idea of the heat death of the universe in 1854---a cheery Scot.

Credit/Permission: Anonymous photographer, circa 1900 (uploaded to Wikipedia by User:Fastfission, 2005) / Public domain.
Caption Credit/Permission: © David Jeffery, 2016 / Own work.
Image link: Wikipedia.
Local file: local link: lord_kelvin.html.
File: Art file: lord_kelvin.html.