What Cous an Elephant Ever Remembers?

Until the seventies, geographers assumed that elephants couldn't swim. So when you found elephant bones on an island, even if they'd gone extinct or something, then there must have been a land bridge,. otherwise there's no way they could have got across. It is quite a long way from malta to shrilanka but it has elephants. Yet takes them out, and wevothe let of their lanes for them to swim in. There signe, heavily sign posted. And i think humans would accompany them e between the islands on small rafts and boats that couldn't accommodate the elephants. Maybe they had memorized various routes, but i think that might be a step beyond