The death of the last speaker of an ancient language in India's Andaman Islands highlights the fact that half of the world's 7,000 languages are in danger of disappearing. Linguist K David Harrison argues that we still have much to learn from vanishing languages.
My journey as a scientist exploring the world's vanishing languages has taken me from the Siberian forests to the Bolivian Altiplano, from a McDonald's in Michigan to a trailer park in Utah. In all these places I've listened to last speakers - dignified elders - who hold in their minds a significant portion of humanity's intellectual wealth.
Though it belongs solely to them and has inestimable value to their people, they do not hoard it. In fact they are often eager to share it. What can we learn from these languages before they go extinct? And why should we lift a finger to help rescue them.
As the last speakers converse, they spin individual strands in a vast web of knowledge, a noosphere of possibilities. They tell how their ancestors calculated accurately the passing of seasons without clocks or calendars. How humans adapted to hostile environments, from the Arctic to Amazonia.
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