The phrase "lost continent" always makes me wonder, how exactly does one "lose" a whole continent?

“失落的大陆”，这个词总会让我好奇，整个的大陆究竟是怎么“失去”的？

The greek philosopher, Plato, brought to the world, the story of the lost continent of Atlantis.

希腊哲学家柏拉图为世界带来了失落的大陆亚特兰蒂斯的故事。