Did seafood encourage 'Out of Africa' trips?

Archaeologists have uncovered the earliest known remains of human habitation by the coast, a finding that may explain how humans ventured beyond Africa at the start of their planetary odyssey.

Mussel shells, sharpened pieces of red ochre and stone micro-tools found in a sea cave in South Africa suggest that Homo sapiens headed for the beach quite soon after emerging from the savannah, they say.

By stumbling upon the rich harvest of the sea, Man found the means to explore beyond Africa, sustaining himself through maritime edibles by probing along the coast, they suggest.