The coolest thing about this article in the New Scientist is that it shows that we can still discover new things about the Middle Ages.
Fresh controversy has broken out over the cause of the Black Death that killed up to half the people in Europe in 1348 and circulated for centuries after that.
For a century the blame has rested with the bubonic plague bacterium Yersinia pestis, which is carried by rats and fleas. But the most ambitious effort yet to find traces of Yersinia in the remains of Black Death victims has failed, and the researchers involved argue that a previous study that did report finding Yersinia was flawed.... They think it might have been a haemorrhagic virus that caused massive bleeding, like Ebola.
The second coolest is that there turns out to be an Ancient Biomolecules Centre.
Update: Here's another one:
Biblical accounts of the construction of an ancient underground tunnel below Jerusalem have been verified by dating the material lining its walls.... [T]he tunnel, just 60 centimetres wide and between one and five metres in height, is the first biblical structure dating from the Iron Age to be authenticated.