Silver iodide is an inorganic compound with the formula AgI. The compound is a bright yellow solid, but samples almost always contain impurities of metallic silver that give a grey colouration. The silver contamination arises because some samples of AgI can be highly photosensitive. This property is exploited in silver-based photography. Silver iodide is also used as an antiseptic and in cloud seeding.
In the era before the dawn of new technologies, mankind advanced at an accelerated pace. Now, technology follows suit, driven by the same innate impulse toward progress. Why? Because it is in the very nature of intelligent beings to advance—first in their intelligence, and consequently in all...