…es the electromagnetic force. The best description I’ve found so far comes from Wikipedia: viz., photons are ‘chunked ripples in a field, or “excitations”, that “look like” particles’ (Wikipedia s.v.; emphasis added). That is, a photon can be considered as a discretely located (w…

… Charles Robert Darwin (1809–1882) Figure 2. Joseph Augustin Hubert de Bosquet (Wikimedia Commons). (1814–1880) (Archives Natuurhistorisch Museum Maastricht, Maastricht). the area, exchanged eleven letters with Darwin on the subject of cirripedes between December 17, 1852, and ea…