Fact: Vikings did not invent mead. Mead has been around for a very, very, very long time (probably about 7,000 years at that point). The Vikings just really, really, really liked it.
Disclaimer: All Thursday Fun Facts are culled from millennia of texts as well as random statements around the internet and they are also made up. They are only facts in the loosest sense of the word (or possibly not at all). Please note the dearth of citations.