Oil major Shell operates a fleet of giant ships permanently moored over oilfields around the world. The ships receive oil pumped from wells beneath the seabed and transfer it to tankers.

Off the coast of Nigeria, one of the world’s largest oil production ships, called the Bonga, was taking oil from a field on the ocean floor and transferring it to a tanker ship.

Bronze Age Scandinavians may have traversed from Denmark to Norway directly over the open sea on large canoes, scientists say ...