On the Ocean: The Mediterranean and the Atlantic from prehistory to AD 1500

For humans the sea is, and always has been, an alien environment. Ever moving and ever changing in mood, it is a place without time, in contrast to the land which is fixed and scarred by human activity giving it a visible history. While the land is familiar, even reassuring, the sea is unknown and threatening. By taking to the sea humans put themselves at its mercy. It has often been perceived to be an alien power teasing and cajoling. The sea may give but it takes.

Why, then, did humans bec...