Beautiful multilingual eye examination chart of the early 1900s San Francisco
112 years ago, optometry was a growing profession. In diverse cities like San Francisco, however, the eye chart commonplace in western countries today could not suffice.
Home on Lagrange
I first came across Lagrangian Points many years ago in Arthur C. Clarke’s novel A Fall of Moondust. It boggled my young mind, picturing satellites orbiting in seemingly static positions around the Moon!
The view from space
This video struck me in a profound way. OVERVIEW from Planetary Collective on Vimeo. Only a few hundred people have been in …