This is clear over the past 2,000 years, which includes both the Medieval Warm Period, when grapes grew in Britain, and the Little Ice Age, when the Thames river froze so hard Frost Fairs were ...

This is clear over the past 2,000 years, which includes the Medieval Warm Period, when grapes grew in Britain, and the Little Ice Age, when the Thames river froze so hard that "frost fairs" were ...