In February 1990, the Voyager 1 space probe reached the outer edge of our solar system. NASA commanded it to take a last image of Earth from 3.7 billion miles away. The planet is only a small speck from that distance.
Seeing that image, Carl Sagan profoundly called our home a “pale blue dot” in the vastness of space. Since then, we inhabitants of that pale blue dot have been turning gray at a rapid pace. The resulting demographic changes may appear insignificant against the backdrop of the cosmos, but they are increasingly visible here at ground level.