Is there any substance that is lighter than air but isn't a gas? - Quora
Brain Teasers - I'm lighter than air but a thousand men can't lift me. What am I? Source : https://gpuzzles.com/mind-teasers/lighter-than-air/ To support us follow our page, https://www.facebook.com/Best.Brain.Teasers | Facebook
Lighter than Air: Sophie Blanchard, the First Female Pilot
Lighter than Air: Sophie Blanchard, the First Woman Pilot