Your old cameras are radioactive in your home. Radioactivity in old camera lenses is due mostly to the widespread use of thorium glass elements in the 1940s, ’50s, ’60s and ’70s. Thorium oxide is highly refractive and low dispersion; this translated into cheaper high-quality glass by allowing manufacturers to make lenses of lesser curvature.

 Pondscum lowlife Judge gets 28 years he so rightly deserves

Still in use after 400 years.