The Russian polar expedition of 1900–1902 was commissioned by the Saint Petersburg Academy of Sciences to study the Arctic Ocean north of New Siberian Islands and search for the legendary Sannikov Land. It was led by the Baltic German geologist and Arctic explorer Baron Eduard von Toll on the ship Zarya. Toll and his three assistants vanished in late 1902 while exploring Bennett Island. One of the key members of the expedition was Alexander Kolchak, then a young researcher and lieutenant of the Russian Navy, and later a ruler of Russia. Kolchak also led the rescue mission to find Toll and his crew.