(The Hill) — Last week marked a grim record for Earth’s climate, as temperatures repeatedly hit — and passed — levels not seen in 125,000 years, according to government scientists. For context, the last time things were this hot, the first modern humans were just beginning to leave Africa, and chips of sharpened flint represented the bleeding edge of high technology. Science moves slowly, and it will be years before we learn the impacts of this new era of heat on urban infrastructure, public health, and the natural world. But as temperatures have consistently climbed over the past decade in…