According to a Danish legend, two female giants are responsible for all the saltiness of ocean water. A Scandinavian king who captured them from the land of the giants ordered from two magic stones. They ground so much salt that they sunk the ship they were on. Today, they sit at the bottom of the ocean, still grinding salt.

Fog

A cloud that touches the earth's surface and is so thick that visibility is less than 62 mile (1 km) is called fog. If visibility is greater than .62 mile (1 km), the ground-based cloud is called mist.
Fog develops when air becomes chilled to the dew point. This usually occurs when warm, moist air flows over cold water. Fog often forms along the northeastern coast of the United States and Canada. The Gulf Stream-a warm ocean current that flows in a northeasterly pattern from the Gulf of Mexico toward Newfoundland, Canada-brings a steady stream of warm air over the colder North Atlantic Ocean, frequently causing heavy fog to develop. Sometimes the ground temperature helps to cause fog. When warm, moist air passes over colder or snow-covered ground, the cold temperature of the ground lowers the temperature of the air to the dew point, and fog forms.

In 1875 Paul jean Coulier, a Frenchman, experimented with air and fog. He sealed moist air in a glass container and applied pressure to the air. Fog appeared as the air was squeezed. After repeating the experiment a number of times, fog no longer appeared. Coulier wondered why. Finally, he decided to add new air to the container. He wanted to see if the new air would make a difference. It did. Fog reappeared when he applied pressure to the new air. Water vapor was condensing around something in the new air that was too small to see. Coulier believed that dust particles were attracting water vapor. Dust in the air, much finer than the dust you may find on the furniture in your home, most likely consists of salt particles from ocean spray, volcanic dust, and even molecules of certain gases that have condensed in the air. Coulier concluded that fog appears only when water vapor is able to condense around dust particles that are present in the air. Applying pressure forces vapor to attach itself to dust particles. Once all the dust particles have been used during condensation, no additional fog can appear. The discovery of the role of dust particles in the atmosphere was an important step toward understanding how the hydrologic cycle works.