Grey Walter’s Tortoises – the video clips

In my research for all things Grey Walter and his tortoises, I have uncovered five (5) video clips available on the internet. Of the five, I have downloaded four of them, the 5th has been allusive for some time, having not been able to re-locate it again after spending many hours trying. It is not …

W. Grey Walter, Edmund C. Berkeley, Ivan E. Sutherland and the Tortoise

Who is Ivan E. Sutherland? Ivan was born in 1938, Nebraska, USA and is a computer pioneer, inventing Sketchpad, being the first what we now call a Graphical User Interface (GUI). He also built a walking machine, but that will be the subject to another post later. As an under-graduate student, Ivan, with his elder brother …

Time-Lapse Photographs of ELMER with ELSIE

I have only come across two time-lapse photographs with both ELMER and ELSIE. One has to be careful in interpreting time-lapse photographs as there are possibly different events happening at different times, off picture interference, and possibly different start times of each tortoise. An important observation highlighted by Owen Holland is the direction of rotation …