Okay so not to rain on any parading going on here, but this is not really the missing "link", there is not really a missing link, rather links, each representing a departure of the human lineage from the animal kingdom, in this case the toes and bone features i think. this is simply the oldest known relative to both humans and apes. The true "link" that would prove evolution would be an explanation for the roughly 3% of DNA that is different between humans and cimpanzees (our closest living relative, assumed to be the most recent branch in our evolutionary tree). finding this difference would enable us to say "here it is, this is what makes you not a fucking chimp, right here this mutation or event or whatever it is is the reason we developed larger brains and resulted in our intelligence and consciousness and humanness." once we can explain that divergence or whatever the most recent divergence is we can have proof of evolution. However, This is still a retardedly huge discovery for science tho and these scientists are going to be heralded as leaders in their field as they should be because they have put us one step closer to finding the answers to these questions.