[agere_contra]

In January, scientists reported that 2015 was by far the hottest year on record, and another record could be set this year.

The Medieval Warm Period was warmer.

The Roman Warm Period was warmer.

The Minoan Warm Period was warmer.

And that's just three warmer periods since the last Ice Age.

[pgkdan]

The Medieval Warm Period was warmer.

You're just being a denier! Don't forget...England and Ireland were under water then. Right? That's why there's no record of those countries during the Medieval period. All islands were under water in fact. Scary stuff! /s

[No_More_Harkin]

How do we know those periods were warmer? I would like to understand more.