"You want proof evolution is for real, don't waste your time with fossils; just check out the New York City rat. They started out as immigrants, stowaways in some ship's cargo hold. Only the survivors got to breed, and they've been improving with every new litter. Smarter, faster, stronger. Getting ready to rule. Manhattan wouldn't be the ﬁrst island they took over."
Andrew Vachss, Another Life