Twitter has lots of garbage but also cool stuff like this on Lonnie Johnson who invented the Super Soaker:
Lonnie Johnson, a Black scientist employed at NASA in the early 1980s, was engaged in a project related to jet pumps. In a fortuitous accident, he inadvertently directed a stream of water across the room, sparking a brilliant idea for an innovative water gun. This led to the… pic.twitter.com/aqzyapQfD6