Fun Fact:Mars is the only planet known to be inhabited solely by robots.#HappyEarthDay !(It's #HootinTootinTuesday again! Post some jokes or funny memes under this hashtag today, and bring lots of smiles to #Mastodon.)#Humor #Humour #FunnyMeme #DadJoke #DadJokes #EarthDay #WorldEarthDay #UnearthedComics #SaraZimmerman
