An "Usborne Internet-linked" book contains descriptions of Web site specially chosen to take readers further into the subject in a fun and informative way; links are found on the "Usborne Quicklinks Web site" at the end of this cataloguing record. -- Discover amazing facts about oceans and marine life.--Follow the tracks of early sea explorers, then learn about the incredible discoveries made by ocean scientists today. -- Numerous lists, charts and maps summarize ocean records and statistics.