Video thumbnail for Why are blueprints blue? - Big Questions - (Ep. 206) | Mental Floss

Why are blueprints blue? - Big Questions - (Ep. 206) | Mental Floss

Jan 27, 2026
Mental Floss Logo

Mental Floss

Verified Open.Video Creator Badge
Why are blueprints blue? - Big Questions - (Ep. 206) | Mental Floss
#Online Video #education #Engineering & Technology