![](https://www.historynet.com/wp-content/uploads/2022/03/Shackleton-near-Endurance-scaled.jpg)
Hauling in the Hjort Metre net containing Robert Clark’s biological samples near the ‘Endurance’, during the Imperial Trans-Antarctic Expedition, 1914-17, led by Ernest Shackleton. (Photo by Frank Hurley/Scott Polar Research Institute, University of Cambridge/Getty Images)