At this point, we’ve learned about man-made byproducts and nature-made byproducts. But how about one that’s a little of both? I’m talking about calthemites, which are secondary deposits that form in ...

Earth is covered with technofossils, or man-made materials, that will last for centuries and maybe even longer. Technofossils, anything that is man-made, including new materials, will persist in the ...