This Cape Farewell video clip explains that phytoplankton absorb carbon dioxide and can act as indicators of global warming. The video clip includes a discussion about a hypothesis that increasing phytoplankton could balance the effects of global warming.

This film, from Twig World, looks at the relationship between time and place. In an age before satellite navigation and GPS, one man found an ingenious solution to the problem of determining a ship's location at sea. The key points made in the film are: •Lines of latitude circle the Earth horizontally; lines of...