16 Feet
BBC NEWS reports that "archaeologists have discovered an intact, ancient Egyptian tomb in the Valley of the Kings, the first since King Tutankhamun's was found in 1922." Apparently the new tomb was about 16 feet away from the famous Howard Carter find. The tomb is relatively intact with five painted sarcophagi.
And this, boys and girls, is why history always seems to change. As new discoveries are made existing ideas are tested. If found worthy they are kept as theories. If found otherwise they are discarded in favor of new ideas. Either way, the quest continues.
From the stories I've read, I don't expect a huge change in what we understand about Egyptian history or burial practices, though one scientist mentioned in the BBC News story speculates it could be the previously unknown burial site of Queen Nefertiti. Still, I'm glad a major find has occurred in this generation so that a new spirit of exploration might be kindled.