Pytheas claimed that thule was six days north of britain , and that the midsummer sun never set there 皮西亚斯声称北极之地离英国北部有六天时间的距离，仲夏的太阳从不在那里下山。
2.
It was first mentioned by the greek geographer and explorer pytheas of massal 千 ( present - day marseille ) in the 4th century bc 它最先在公元前四世纪被希腊地理学家和探险家皮西亚斯提及到。
