Sirius Thinking Ltd is an American production company best known for educational children's television, including Between the Lions and WordWorld. Its closing logo, built around a dog in a nod to Sirius, the Dog Star, became familiar to viewers who watched those programmes through to the credits. As clips of old broadcast logos began circulating online as nostalgia posts and memes, this short sting was shared on its own, valued less for information than for the immediate childhood association it triggers for many viewers.