<Li> 1643--Maarten Gerritsz Vries sails along the eastern coast of "Yezo" (Hokkaidō), between Iturup and Urup, to Sakhalin . </Li> <Li> 1643--Vasiliy Sychev discovers the Anabar, where he establishes the zimovie Anabarskoye . </Li> <Li> 1643--45--Vassili Poyarkov crosses the Stanovoy Range and descends the Zeya to the Amur, which he follows to its mouth; from here, he coasts along the Sea of Okhotsk to the Ulya (on the way sighting the Shantar Islands). </Li> <Li> 1644--Tasman maps the northern coast of Australia, connecting "Nova Guinea" (the Cape York Peninsula) with "the land of D'Eendracht" (Western Australia). </Li>

Which continents were not explored by european explorers