>If whales are using their songs to communicate with one another, they are doing so not just across space but also across time. A call made by a humpback near B

>If whales are using their songs to communicate with one another, they are doing so not just across space but also across time. A call made by a humpback near Bermuda would take twenty minutes to reach a humpback swimming off the coast of Nova Scotia. If the Canadian whale answered immediately, it would be forty minutes before the Bermuda whale heard back. So whales aren't speaking on the phone, they send mail. :)