Today (March 21) marks Twitter's eighth birthday. Although the iconic social media platform was launched in July 2006, it was March 21, 2006 that Twitter was officially founded. We've all seen how Twitter has changed the world, but do you remember the site's humble beginnings? It's a bit of a blur, but thanks to Twitter's 'Discover' feature, we can see the very first tweets sent out by your favorite rock and metal musicians.

'Discover' is as simple as can be. Used like a search engine, all you've got to do is type in someone's Twitter handle and the first tweet ever sent from that account will pop up. We've searched through tons of bands and musicians, and there's something fascinating about seeing each inaugural tweet.

Check out this collection of more than 20 first tweets sent out by rock and metal's biggest names: