Black Death study lets rats off the hook World news The Guardian
An archaeologist in London claims that if the plague of 1348-49 was spread by rats, he should be finding masses of rat skeletons. Since he isn't, he theorizes that the plague was spread human-to-human. This explains its extremely rapid movement, even in the super-cold winter that year, when fleas should have died. Somehow, I never imagined plague studies could get grosser when rats were taken out of the picture.