This December, Hannah Zanowski, a graduate student at Princeton University, will travel to Cape Town, South Africa, bundle up in something warm, and board a German research icebreaker called the Polarstern. Over the next eight weeks, the ship will make its way from the southern tip of Africa to the bottom of South America via the Weddell Sea off the coast of Antarctica, stopping every so often along the way, so Zanowski and the scientists she’ll be working with can plop one of 12 yellow, oblong, instrument-laden, robotic floats into the sea.

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