Which Russian ruler and naval commander also took part in polar expeditions to study the Arctic Circle?
Russian polar expedition of 1900–02 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 Russian geologist and Arctic explorer Baron Eduard 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.
Jacob Bruce Count Jacob or James Daniel Bruce (, "Graf Yakov Vilimovich Bryus"; 11 May 1669 – 30 April 1735) was a Russian statesman, military leader and scientist of Scottish descent (Clan Bruce), one of the associates of Peter the Great. According to his own record, his ancestors had lived in Russia since 1649. He was the brother of Robert Bruce, the first military governor of Saint Petersburg.