Mineral, In a strict sense, a mineral is a naturally occurring solid substance that has a definite, uniform chemical composition and that was formed by an inorganic process—that is, by a process not involving living things.
WHAT'S INSIDE: EARTH SCIENCE
We've been scribbling our thoughts down on stone and paper for a while now. But the job of assembling a history for all of humanity gets a lot harder once those written records disappear. Luckily, archaeologists are happy to tackle the job.
To see a dinosaur these days, you can visit any number of museums or traveling exhibits. But you don't necessarily have to leave your yard either.