Because the Dragon Ball universe is so wide, we may miss some interesting information, even if that information is hidden until it is revealed.
1. How old is Vegeta?
Vegeta's official birth year is Age 732, making him 48 years old by the end of Dragon Ball Super in Age 780. However, this doesn't take into account the amount of time he has spent inside the Hyperbolic Time Chamber, which he has spent a collective 5 years inside.
This makes him, theoretically, 53 years old by the end of the Universal Survival Arc. As old as he seems, he was born only 1 year before both Yamcha, Bulma and older than Goku about 5 yrs
2. Vegeta looks like the first Super Saiyan God
Yamoshi is an ancient Saiyan who could transform into a Super Saiyan long before Goku could. After his death, his spirit wandered in search of six pure-hearted Saiyans, to create the ceremony that would birth the first Super Saiyan God.
He was immortalized as the Legendary Super Saiyan, thought to be nothing more than a myth until Goku's first ascension during his fight with Frieza one thousand years later.
What is the problem here? That's Vegeta look like Yamoshi both in normal form and in Super Saiyan. Could Vegeta be a descendant of Yamoshi?
3.Real name of Android 17 and Android 18
According to the Dragon Ball Full Color Androids Saga manga, Android 18's real name is Lazuli.
Her brother, 17, was formerly Lapis. Both names together form Lapis Lazuli, a blue stone. They aren't blue in appearance but share the same striking blue eye color.
After everything Dr. Gero put them through in DBZ, it would seem like Androids 17 & 18 would want to use their human names again -- so why don't they?
4. Goku Has Only Died To Green People
As the main character of the series, it's not surprising that when Goku dies, he usually goes out in a blaze of glory that causes a heavy impact on the people around him. What may be surprising, however, is that not only has Goku only died twice but both times it was by sacrificing himself at the hands of a green-skinned monster.
Goku's first-ever death was by Piccolo in Dragon Ball Z, when he sacrificed himself to help defeat his brother, Raditz, and take back Gohan. The second, and better-remembered death, was when he transported Cell to King Kai's planet so he wouldn't destroy Earth.
5. Akira Toriyama Can Be Forgetful Of His Own Work
As with any series as long-running as Dragon Ball, it can be difficult for its creator to keep track of the many small plot points and characters dotted throughout its run. In Toriyama's case, he has done this more than once. Lunch, the girl with a dual-personality that changes when she sneezes, was all but abandoned during Dragon Ball Z when Toriyama forgot she existed.
Toriyama sort of did this again later in the series, when new Saiyans were born without their trademark tail, something he didn't omit with Gohan but subsequently did with Goten, Pan, and Trunks. In this case, Toriyama consciously decided to remove them from Dragon Ball, although the series never explained the change.
6. Turtle Has A Son
One side character who has very little screen time is Turtle, the 1000-year-old companion of Roshi who often tries and fails to keep his perverted nature in check. During the majority of the series, not all that much is known about his character other than his loyalty to Roshi; however, in one episode, Kame House: Found!, Turtle is shown to have at least one child with his son, Taru.
Taru never shows up in the series again, and the audience learns next to nothing about him after his one-time appearance. He doesn't even show up at his father's 1000th birthday party.
7. Piccolo Skipped The Awkward Teen Phase
If, like many people who didn't get into Dragon Ball until Z, someone thought that Namekians aged similarly to humans and Saiyans, they would be forgiven for being completely and utterly wrong. Aside from the fact that Namekians seem to be able to live for thousands of years without looking even as old as Master Roshi, Piccolo, in particular, seems to age weirdly even among his own kind.
When King Piccolo is defeated by Goku, he spits out an egg that eventually becomes the Piccolo that fans know of today, minus his future fusions with Nail and Kame. What makes his aging so odd though, is how quickly Piccolo went from a newborn to a full-grown adult. Even Dende has a long period as an adolescent, but Piccolo apparently didn't get the memo.
8. Master Roshi Won't Fly Out Of Pride
Before the introduction of Tien, Chiaotzu, and the Crane School, the main cast's ability to fly was limited to capsule vehicles and Nimbus. Once it was revealed that fighters could fly using their Ki, nearly every main fighter in Dragon Ball taught themselves how to do it, but one of them flat out refused to learn: Master Roshi.
As a rival to Master Shen, the head of the Crane School and creator of the flight technique on Earth, Roshi refuses to learn the technique, especially since Shen embodies a side of martial arts that he is heavily opposed to.
