And he's using a kind of DNA fingerprinting, and he says, "If somebody gives me a mouse, doesn't tell me where it's from, just by looking at its DNA, I can tell exactly from which park it comes."
Utiliza un tipo de identificación genética y dice: "Si alguien me da un ratón sin decirme de dónde es, sólo con mirar su ADN puedo saber de qué parque viene exactamente".