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From the frozen ice caps of the polar regions to the warm waters of the tropical coral reefs, from deep sea vents to shallow seagrass beds, the oceans contain the greatest diversity of life on Earth.

Each week sees Alan welcoming some familiar faces to Hampshire. (Image credit: ITV) Love Your Weekend with Alan Titchmarsh episode guide and special guests Sunday, April 5 - Susie Dent, Sheila ...