How It's Made

The programme explores the manufacturing of lenses, crisps and computer processors, charting how production techniques have shifted from early manual methods to modern automated factories. It also details the natural formation of granite from cooled magma deep within the Earth.

The episode titled Lenses/Granite/Crisps/Computer Processors is a programme that falls under the episode genre. It presents a range of manufacturing and natural‑formation topics within a single instalment, offering viewers a look at both industrial and geological processes. In the main part of the show, the production of lenses, potato crisps and computer processors is examined. The segment outlines how each of these items is made and points out the ways their manufacturing techniques have developed over the years. By comparing older methods with current practices, the episode highlights the shift towards more efficient and sophisticated processes. The programme also turns its attention to granite, explaining how this common rock is formed deep within the Earth. It describes the natural conditions that lead to the solidification of molten material into the coarse‑grained stone we see in buildings and monuments. Overall, the episode weaves together the stories of human‑made products and a natural material, showing how both have been shaped by advances in technology and the forces of nature. It gives a concise overview of the evolution in production methods while also shedding light on the geological background of granite.