Within this general field, surveying changes in the volume and stability of the ice-cap is vital, since these may have profound effects on world sea levels and on ocean currents.
Over the next 300 days, Anguilla Anguilla larvae ride the ocean currents 6,500 km to the coast of Europe — making one of the longest known marine migrations.
Constantly moving is the only thing keeping jellyfish afloat, but even with this effort they can be easily pushed around by strong winds or ocean currents, which is what leads some jellyfish to be washed up on beaches.
Where it washes up now has told scientists much about the ocean currents, but also about how plastic in our oceans can last not just for decades, but hundreds of years.
Once it finds a suitable gap, it'll place the egg inside, and the corkscrew-like shape helps hold it in place, so the ocean current doesn't wash it away.
But ocean currents from Antarctica ensure it almost never rains on the islands, allowing guano to harden, locking in layer upon layer upon layer of nitrate-phosphate goodness.
It was a school experiment to see where the ocean currents would take the 1.8-meter long boat which was equipped with a satellite positioning system, or GPS.