In case you missed it, a massive fortification wall from the early/mid-second millennium B.C. was recently discovered in the City of David, the heart of ancient Jerusalem.
Why is this significant?
Recent decades have seen the rise of the "minimalist" school of ancient Israelite history. Several important scholars have argued that, although the Bible portrays Jerusalem as an important fortress city already from the time of Joshua, in fact it was a relatively small and unimportant site until, say, the reign of Hezekiah.
The full implications of the discovery of this wall will take a while to digest, but this much is clear--it doesn't help the minimalists' case.