"NASA scientists have dropped 90 ducks into holes in the Jakobshavn glacier – Greenland's fastest moving glacier – in a bid to understand why glaciers speed up in the summer in their march to the sea.
The toys have been labelled "science experiment" and "reward" in three languages, and carry an email address.
The ducks, if found by someone who emails NASA about their discovery, could tell scientists how melting water moves through ice, said Alberto Behar of NASA's Jet Propulsion Laboratory in California."
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