This is your anscestor. And mine.

As a matter of fact, according to a report today, it’s the jawbone of one of the fist humans. Phallab Ghosh from BBC reports,

The 2.8 million-year-old specimen is 400,000 years older than researchers thought that our kind first emerged.
The discovery in Ethiopia suggests climate change spurred the transition from tree dweller to upright walker.
The head of the research team told BBC News that the find gives the first insight into “the most important transitions in human evolution”.

And it’s a link with the famed LUCY.

The early human. Defined by a jaw. Not a brain. That stuff came later.