No, I can't do it! I'd hate myself the rest of my life! But still, those friendly dinosaurs are a menace! Wait! Now I know the perfect solution to the problem! I have to build a gigantic "ship" for them, and then... 
Captain Marvel Adventures #123 is an issue of the series Captain Marvel Adventures (Volume 1) with a cover date of August, 1951.
Synopsis for Captain Marvel: "Captain Marvel and the Dinosaur Dilemma" or "The Pets from the Past!"
Mr. Morris leans in to tell Billy Batson in his office that he’s got a new pet, Dino the Dinosaur, a small friendly animal reminiscent of a small dog in excitability and energy. It leaps out the window and Billy calls SHAZAM to summon Captain Marvel to catch him and bring him back. Captain Marvel seems bemused that Mr. Morris doesn’t seem to realize he bought an impossible animal from a local pet shop and soon finds that the pet shop has many of the Baby Dinos for sale! Mr. Wheeler of the Pet Shop says he bought them off of Zeke Purdy, an elderly farmer on Route 6, who hatched them from eggs. Purdy soon shows Captain Marvel to the ice cave where he found the perfectly preserved dinosaur eggs and Captain Marvel accepts this as reasonable.
Billy soon introduces Dino on WHIZ-TV and explains how there are a handful of living dinosaurs in the modern age. Dino soon becomes a lovable pet of Station WHIZ, but Mr. Morris soon finds that Dino’s becoming too large to easily pull along by lead and now has become as dangerous in the studio as a horse, forcing Billy to call SHAZAM and summon Captain Marvel to pin down the creature. Captain Marvel rounds up the dinosaurs (since they’re now a problem for all their owners) and helps to build a giant pen for them in the countryside. Over the course of days though, Dino grows larger still and easily walks through the fence. Captain Marvel offers they’ll likely just have to kill them, offering that the meat could make Zeke tons of money and the skin and bones would make a wonderful museum pieces…. But even the World’s Mightiest Mortal doesn’t want to commit saurian genocide, so he instead just puts them all in a spaceship and shoves them to the Rock of Eternity so they can live in the past of 1,000,000,0000 BCE to the end of their natural lives. Later, Mr. Morris has instead bought a baby gorilla that immediately starts attacking Billy’s necktie.
Appearing in Captain Marvel: "Captain Marvel and the Dinosaur Dilemma" or "The Pets from the Past!"
Featured Characters:
Supporting Characters:
Antagonists:
- Dino the Dinosaur
- Other Modern Dinosaurs
- A Baby Gorilla
Other Characters:
- Mr. Wheeler
- Zeke Purdy
Locations:
- Earth-S
- The Rock of Eternity
- 1,000,000,000 BCE
Items:
Vehicles:
- A Dinosaur Spaceship
Synopsis for Captain Kid: "Too, Too Hot!"
It is way too hot out in Podunk City, so Captain Kid borrows $10 that Pudgy has saved up over the summer doing hard jobs that all were horrible, but promises interest. He soon buys $10 worth of ice and drives it around town in a small yellow pickup truck. Captain Kid worries when everyone decides to buy the ice and finds it’s all melted, since he doesn’t want to do all that horrible work, but manages to come up with a better idea: making the truck into a makeshift pool for a quarter a visit! Captain Kid brags, but thinks on how it was really all another convenient accident.
Appearing in Captain Kid: "Too, Too Hot!"
Featured Characters:
- Captain Kid
Supporting Characters:
- Pudgy
Antagonists:
Other Characters:
- Ice Salesman
Locations:
Items:
- Ice Tongs
Vehicles:
- An Ice Truck / Swimming Pool
Synopsis for Captain Marvel: "Captain Marvel Battles the Joy Killer!"
Billy Batson finds that a dentist, Harley Groob DDS, has moved into the Station WHIZ Building and asks Billy to tell people he’s open for business. Dr. Groob tries to help out Mr. Morris, who’s having a bad toothache, but it does nothing at all to help. Billy asks to see Dr. Groob’s license and he starts to become violent, prompting Billy to call SHAZAM and summons Captain Marvel. Shoving him into his own dental chair, Captain Marvel finds that his license was revoked for malpractice in another city. Mr. Morris says he’ll be “generous” by giving him 24 hours to pack up and get lost. Groob decides to ruin Mr. Morris’ business and that they took away his license for inventing Gloom Gas, the exact opposite of Laughing Gas and changes into a costume of green plaid pants, a dark coat, a fake beard, a dark fedora and sunglasses, calling himself… the Joy Killer! He sprays Billy while he’s in the studio and he starts to mope and cry about how everything sucks. Once he’s done, Billy tries to get some happiness by visiting Studio H and watching Comedy Capers being filmed… but the Gloom Gas there has made their resident comedian having a depressive breakdown down Camera One. Spotting the Joy Killer, Billy calls SHAZAM and Captain Marvel goes to stop him, taking Gloom Gas to the chest with little effect, but the Joy Killer manager to escape by yanking an entire curtain atop Captain Marvel’s head. While Captain Marvel is out trying to find him, the Joy Killer sneaks on to the set of The Happiness Hour, The Cheer Club and Fun Festival and ruins all three shows. While trying to ruin Mister Sunshine, Captain Marvel finally catches up with him and the Joy Killer throws the whole tank at Captain Marvel to make his way out a stage exit. Captain Marvel finds “Dr.” Groob in his office and finds his beard hanging out of a drawer and punches him over. Later, Billy reports that everyone is happy because they flooded the building with laughing gas to counteract the Gloom Gas and that Mr. Morris got his teeth fixed at a better dentist.
Appearing in Captain Marvel: "Captain Marvel Battles the Joy Killer!"
Featured Characters:
Supporting Characters:
Antagonists:
- The Joy Killer (Harley Groob)
Other Characters:
Locations:
- Earth-S
- New York City
- WHIZ-TV
- "Dr." Groob's Office
- A Rose Flower Shop
- WHIZ-TV
- New York City
Items:
- Groob's Gloom Gas
- Laughing Gas
Vehicles:
Synopsis for Mr. Tawky Tawny: "Captain Marvel and Mr. Tawny, Fighting Mayor"
Billy Batson dashes in to Mr. Tawny’s house to let him know that Mayor Denton of Wildwood has died in a plane crash and a special election is soon to be held to replace him. There is a knock at the door and President of the “Citizen’s Civic Club,” Alger Boone, tells Mr. Tawny he wants to elect him for Mayor on his ticket of honest government. Billy points out Wildwood is a moderately small town, so being Mayor is only a part-time job and Alger agrees to this. Alger goes back to his hideout and tells his goons that his plan has worked perfectly: he’s kidnapped Mayor Denton and faked his death in a plane crash to install his own, more loyal Mayor, believing Mr. Tawny will do whatever they can trick him into. Captain Marvel helps Mr. Tawny by flying him to his events where he says he’s anti-gambling, anti-graft and anti-crime, which people like, since they elect him Mayor of Wildwood. The next day though, Mayor Tawny finds that there’s little on his itinerary beyond local event appearances and a monthly board meeting and Alger Boone releases his men to start doing more gambling, graft and crime! Billy Batson spots a jewelry store being robbed and calls SHAZAM to summon Captain Marvel, who easily punches over the thieves and decides to see Mayor Tawny about this.
Mayor Tawny tells the World’s Mightiest Mortal that Boone promised to help him with this strange new crime wave, but has seemingly all but disappeared. Captain Marvel asks if he’s a man or a mouse (despite being neither) and Mayor Tawny decides he’s going to solve crime on his own, chopping down pinball machines with a fire ax, arresting people at gambling dens and finding all the known criminal hideouts. Boone decides to dress up like the Phantom Inkblot in order to stab Mayor Tawny in his sleep. However, after he leaves, the lights to snap on and Captain Marvel reveals that he anticipated that Boone would come and do this and that he only stabbed a dummy. They follow him to his hideout and find him about to shoot the real Mayor Denton and unmasks Boone. Mayor Tawny leaps in and punches Boone in the face. Mayor Denton returns to being in charge of Wildwood, but the citizens send Mr. Tawny a memento, commemorating his time as “Fighting Mayor.”
Appearing in Mr. Tawky Tawny: "Captain Marvel and Mr. Tawny, Fighting Mayor"
Featured Characters:
Supporting Characters:
Antagonists:
- Pres. Alger Boone of the Wildwood Citizen's Civic Club
Other Characters:
- Mayor Denton
Locations:
- Earth-S
- New York City
- Wildwood
- New York City
Items:
- Pinball Machines (Destroyed)
Vehicles:
Notes
- Despite the cover, it's not made clear if these dinosaurs eat raw steak, heads of cabbage, or both, since Captain Marvel himself does almost no actual direct care for them, just helping to relocate them when they become a problematic size. They also are green instead of gray.
Trivia
- This issue would be nearly nine years earlier than Dino the Dinosaur appearing in The Flintstones, a similar kindly, canine-patterned bipedal dinosaur whose size is a matter of some difficulty.
- It appears that, according to Ape Law, until 2004, Mr. Morris would've had every legal ability to own a Baby Gorilla as a pet in the State of New York, though it had been illegal to import them since 1975.
- Captain Marvel may have horribly miscalculated: There would be no life on Earth in 1,000,000,000 BCE as this would be during the Stenian Period, during which there was very little oxygen or multicellular organisms on the planet.
- Pinball, at this time in history, was considered to be a game of ill repute due to its ability to take children's money and offer them nothing in return. Thus, Mayor La Guardia would ban pinball in New York City from 1942 until 1976, when it was legally proven that one can be skilled at pinball.
See Also