Over the course of sixty years, the Justice League has seen some wild adventures. It shouldn't be a surprise with so many iterations of the team. What is surprising, however, is that most of their weirdest moments aren't from the Silver Age. Even the eras with a more serious Justice League saw weirdness worthy of the Doom Patrol. RELATED: 10 Justice League Villains Too Weird For The DCEUWriters seem to like puttingtheir own spin on the Justice League's adventures and taking a new team into bizarre circumstances has become a rite of passage. Aliens, transformations, magic, and extradimensional mischief can cause bizarre effects, leaving DC's mightiest heroes wishing for a nice, normal parademon attack.

9 The Justice League Were Turned Into Trees.

JLA slowing turning into trees in DC Comics

One of the Justice League of America's first adventures was one of their weirdest. Justice League of America #9, by Gardner Fox, Mike Sokowsky, and Bernard Sachs, unfolded the team's origin. The world's greatest superheroes came together to fight the space-faring Appellaxians. The aliens were using Earth for their battleground. Each alien had a different elemental form and transformed people to match.

Five heroes came across the alien that took a tree-like form after defeating others alone. This Appelaxian transformed the heroes into their own tree shapes. They escaped by scraping the wood off of Green Lantern's ring and then worked together to defeat the alien menace.

8 The Justice Leaguers Switched Secret Identities

Doctor Light mixes up  theJLA's memories in DC Comics

Justice League of America #122 was a secret case of the Justice League. Martin Pasko, Frank McLaughlin and Dick Dillin told readers why the JLA knew each other's secret identities in this story about a scheme hatched by Doctor Light where he used a mineral Amnesium to steal the knowledge of their identities from five heroes. Bafflingly, he then switched their memories around randomly.

Light planned to kill the JLA with traps that the correct dual identities would be able to escape from. Unknown to the villain, Aquaman actually had another identity under his birth name, Arthur Curry. Working together, the Justice League stopped Dr. Light. Then, they resolved that each member would know the others' identities to protect themselves from an unlikely repeat of the same scheme.

7 The Justice League Were Aged By An Alien Lifeform.

The Justice League artificially aged in DC Comics

In a multipart story in the Justice League of America story "There's No Place Like Home," the League moved into their original cave headquarters where they found a cute alien lifeform they adopted as a pet. Mysteriously, they also started aging rapidly, as the alien they called "Junior" drained their lives and evolved into a humanoid form.

RELATED: 10 Greatest Justice League Members, Ranked By CourageSeveral former members of the League came to their rescue. Martian Manhunter had found an old case file that showed the organism's origin. Superman had unknowingly brought it back from space as a spore. It was a sort of telepathic vampire that drained life energy. The ex-Leaguers lured the creature to its destruction and Superman diverted their lost life energy back to his friends.

6 Justice League Antarctica fought Killer Penguins.

Big Sir begs to save killer penguins in DC Comics

When Major Disaster's Injustice League interrupted a hostage situation with their own heist, they were mistaken for heroes and joined the Justice League International. Maxwell Lord stationed them in Antarctica with the hapless Green Lantern G'Nort. It was his way of keeping all of them out of the League's way.

Unfortunately, a genetic research station in Antarctica had crossed penguins with piranha. The birds got loose and threatened to escape to civilization. Things were bleak, even with the arrival of backup but Major Disaster used his powers to collapse their headquarters, burying the penguins under tons of ice and rock.

5 The Justice League Merged With The Marvel Universe.

Heroes from the Marvel/DC mash-up Amalgam Comics.

In 1996, the two largest publishers cooperated on a massive crossover. DC vs Marvel pitted almost every hero against their rival company's counterparts. As individual battles saw their climax, the two universes merged. The result became known as the Amalgam Universe.

RELATED: 10 DC Events That Still Need A Sequel

The mixed results were sometimes atrocious but some combinations are still fan favorites. Spider-Boy, Lobo the Duck, and Thorion rank among the most beloved Amalgamated heroes. Despite being one of the weirder ideas DC tried during the decline of the 1990s, Amalgam still has its own charm.

4 The JLA Fought An Army of Angels.

Superman wrestles an angel in DC Comics

Grant Morrison brought a lot of strange ideas to JLA. Their stories shattered expectations by introducing the angel Zauriel to the team when they couldn't use Hawkman. The resulting tale was one of the JLA's most memorable adventures.

Zauriel had voluntarily left Heaven and was pursued by rebel angels, agents of the renegade angel Asmodel. The League joined Zauriel and battled Asmodel's heavenly host over San Francisco. They managed to push them back, as Wonder Woman threw back their chariots and Superman literally wrestled an angel to a standstill.

3 The Justice League and Looney Tunes Teamed Up!

Superman meets Bugs Bunny, the Justice League meet the Looney Tunes in DC Comics

In 2000, DC got the idea to crossover two franchises that felt like they should never touch. Superman & Bugs Bunny told how Mr. Mxyzptlk and the last Do-Do worked together to merge the two Warner Brothers universes. It was all in order to sow seeds of chaos, and the harvest was a bumper crop.

RELATED: 10 Looney Tunes Shorts That Still Hold UpThe universes mixed up several of the Looney Tunes mimicking the JLA. The merger was halted when Mxyzptlk and the Do-do turned on each other. The two groups went their separate ways after uniting against the Toyman and the story finished with Perry White ending up with a box containing the singing, dancing Michigan J. Frog.

2 The JLA Was Turned Into Apes By Gorilla Grodd.

The Justice League transformed into gorillas in JLApe, in DC Comics

The JLApe storyline ran through the 1999 annuals and was kicked off when Gorilla Grodd turned the JLA into gorillas. Grodd planned to turn humans into apes so that he could absorb their brainpower, enhancing his own mental power and unstoppable intellect.

JLApe led to a plethora of brilliant covers by Art Adams. It was entertainingly silly but the event was largely structured around the eye-catching cover art. DC's told stories with weaker plots and for less reason but the storyline was too weak for fans to really remember.

1 The Justice League Had A Tiny Starfish As A Pet.

Jarro, the tiny Starro, helps the Justice League in DC Comics

Most recently, The Justice League's strangest moment came when Batman tried to study a sample of Starro the Conqueror. The tissue sample regenerated into its own entity that Batman placed in a jar, naming it "Jarro."

Jarro cared for the Caped Crusader, even calling him "Dad." Jarro even dreamed about becoming Batman's favorite Robin ever. The League saw Batman's compassion whenever he dealt with Jarro and the Dark Knight even hugged his alien son. While Jarro faced death many times, readers saw him alive at the end of Death Metal so he's likely to return.

NEXT: 10 Best Justice League Artists Of All Time