Over the last few weeks, life has been getting a bit busy, and interfering with my ability to get to the keyboard! Not an excuse. Just an explanation. And not a very clear one either! Anyway: Perhaps it is time to get back on track…

Continuous, self propelled tracks were first conceived in the 1770’s, but it was probably not until the early 20th century that they became a method of choice for moving heavy vehicles such as tanks, bulldozers and Antarctic exploration vehicles across soft, uneven ground. The term ‘Caterpillar tracks’ was trademarked in 1911 by Benjamin Holt.  Such tracks have featured in LEGO sets or either as continuous rubber bands, since 1969 and as interlocking linkages since 1974 (Element 273). Continue reading →