You are using an older browser version. Please use a supported version for the best MSN experience.

127 Amazing Facts for National Trivia Day

Mental Floss Logo By Alvin Ward of Mental Floss | Slide 1 of 127

1. A reindeer's eyes change color through the seasons. They’re gold during the summer and blue in the winter.

© iStock

More from Mental Floss

image beaconimage beaconimage beacon