TL;DR: They found some fossils in Greece and Bulgaria, the jaws and teeth of which suggest they belonged to an evolutionary ancestor of Homo sapiens sapiens , and which seem to be older than any other such fossil records. "If this status is confirmed by additional fossil evidence, Graecopithecus would be the oldest known hominin..." where hominin is defined in the paper to mean "humans and their non-ape ancestors". E…
it's weird to find just one fossil, with all the excavations going on and around in Europe.
Let that sink in: over 4 million years of human history, and all remains we have found fit in the back of a pickup truck.
Scientists draw conclusions based on evidence found, but truth is, we really don't know that much about our ancestors. The vast majority of bones don't fossilize and just decay. You can excavate all you want, but it takes very specific circumstances for organic material to be preserved over a course of hundreds of thousands or even millions of years. Most of it is just gone.