You are given a sentence in Galician. Your job is to translate the Galician sentence into English.

E isto sucedeu nun momento no que a xente recen chegada comezaba a darse de conta de que os dinosauros non eran eses grandes reptiles verdes e parvos como se pensou durante anos.
And it happened to be at a time when people were just starting to begin to realize that dinosaurs weren't the big, stupid, green reptiles that people had thought for so many years.

So a ten un de cada catro millons de nenos e dunha forma sinxela, o que acontece e que, a causa dunha mutacion nun xene, crease unha proteina toxica para a celula o que provoca que estes suxeitos envellezan sete veces mais rapido do normal.
Only about one in every four million kids has this disease, and in a simple way, what happens is, because of a mutation in a particular gene, a protein is made that's toxic to the cell and it causes these individuals to age at about seven times the normal rate.

Pero, cantas persoas operamos a primeira vez?
But how many did we do the first one? 12.