Continuity mistake: A tyre explodes and the remains go all around Tintin. But by the time the earthquake begins, nearly 80% of the burst tyre remains have vanished. (00:05:25)
Revealing mistake: After Tintin exits the observatory, there is a shot showing us the meteoroid in the sky. In this shot, stars are visible through it. (00:04:40)
Audio problem: When Tintin first sees the telescope, he says "What?" His mouth is out-of-sync when he says this. (00:02:50)
Continuity mistake: Tintin arrives at the observatory with a green shirt. But by the time he finds the telescope, he suddenly has a yellow shirt. Then as Tintin walks back to the apartment, he has the green shirt again. (00:02:25 - 00:02:55)
Continuity mistake: Tintin has a black and red striped tie as he and Snowy are walking. The tie becomes a black and brown striped tie by the time he returns to the apartment. (00:01:40)
Audio problem: When Tintin says "Maybe we should go back inside" his mouth doesn't move. (00:09:20)
Deliberate mistake: Captain Haddock finds out the SOS was a fake so he tells the engine room to increase speed. Just after they increase speed and Tintin says "The people financing the Peary", we can tell the boat isn't moving since the background is entirely still and not moving an inch. (00:14:45)
Revealing mistake: When the scientists are eating their dinner and begin to get sea sick, one of them has a glass of wine. The wine slides along the table, yet the wine in the glass stays in a fixed position. (00:10:40)
Answer: According to Wikipedia, he is described as being a youth anywhere from 14 - 19 years old. There is no specific age.
raywest ★