Here is a concise summary of the provided text, which appears to be a transcript of a video about "30 Secrets You Didn't Know About The Simpsons Twins" (Jerry and Terry):
**Summary:**
* **Identity:** The Simpsons twins are named Jerry and Terry, with Jerry being the older one, although they're often indistinguishable.
* **Characteristics:**
+ They have yellow skin and brown hair.
+ They dress alike and have a secret twin language.
+ They believe they're smarter together.
* **Relationships:**
+ Possible romantic interests in Bart Simpson, with one instance of a kiss.
+ Attempts to befriend Lisa, despite often teasing her.
* **Family:**
+ Have a grandmother with large glasses.
+ Parents (Berry and Mary) are introduced, with the father being a supervisor at the Springfield Nuclear Plant (with inconsistent skin tone in different episodes).
+ Older twin brothers (Gerry and Larry) are mentioned, who resemble them.
* **Miscellaneous:**
+ Appear in various episodes, including "The Simpsons Game".
+ One episode suggests they might be triplets, with a missing sibling seeking revenge.
+ Creators imply Bart has feelings for one of the twins, but doesn't know which one.
Here are the extracted key facts, each with a number and in short sentences, excluding opinions:
1. The Simpsons twins' names are Jerry and Terry Michael Greif.
2. Jerry is the oldest twin, but they are very similar.
3. Matt Groening, the creator, said Jerry is always on the left.
4. The twins are in the 4th year at Springfield Elementary School with Bart Simpson.
5. They dress alike and rarely separate, believing together they are smarter.
6. In Season 24, they were separated for a test and struggled to cope.
7. The twins appear in the first episode of the series, singing with their class.
8. They have yellow skin and brown hair.
9. They have a secret twin language that only they can understand.
10. Initially, they never made fun of Lisa, but later targeted Bart and occasionally Lisa.
11. In the episode "Blue and Gray", it's revealed they were once triplets, but one disappeared.
12. The missing triplet sought revenge for being rejected due to being different.
13. The twins have older brothers who are also twins, named Jerry and Larry.
14. Their grandmother wears huge glasses, as seen in the episode "My Hero, Grandpa".
15. The twins' father, Berry, was a supervisor at the Springfield Nuclear Plant.
16. He once fired Homer for causing an accident during a school visit.
17. In one episode, their father is depicted as dark-skinned.
18. The twins share the same birthdate as Rod Flanders.
19. They appear in "The Simpsons Game" video game.
20. In the game, it's mentioned that their parents are separated.
21. The twins are known for wearing purple dresses, headbands, and shoes, and have purple hair.
22. According to the series creators, Bart Simpson is in love with one of the twins, but doesn't know which one.
23. The twins have a cousin who doesn't resemble them and is in love with Bart, as seen in "Our Unhappy Years".
24. In an alternate Season 27 episode, it's revealed that Bart had a relationship with Terry but couldn't tell the twins apart.