Here’s why: Most of the military’s optical sensors, which convert an image into an digital signal, are designed by drawing inspiration from human optics. This means that our machines have so far been largely limited to seeing only what we can see. The problem is, the human eye isn’t great. Even if you’re blessed with 20:20 vision, you miss a lot of stuff because our eyes can only detect a small proportion of the all the light waves that are actually bouncing off objects."
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