Today marks the 71st anniversary of the first appearance of Krypto the Superdog in Adventure Comics 210.
Krypto appeared 17 years or so after Superman first appeared and 10 years after we'd been introduced to Superboy - tales of Superman when he was a boy. In short, Superman had been around, had a radio show and had been on television for three years by the time Krypto appeared in a Superboy story.
Until Krypto appeared, four years before Supergirl, Superboy had been really the only survivor of Krypton. This space-faring dog was Superboy's first real, direct connection to not just his home planet, but his actual parents and home.
While Krypto was shown to be an untrained pest (shades of 2025's Superman movie), he was also a fellow, last Kryptonian.
His story in this comic was that he was the El family dog who had been sent by Jor-El in a test rocket that got knocked off course and lost in space until the events of this issue, Superboy arriving on Earth and becoming a teen in the interim.



















