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A sea is a large body of salt water that is surrounded in whole or in part by land. More broadly, "the sea" is the interconnected system of Earth's salty, oceanic waters—considered as one global ocean or as several principal oceanic divisions. The sea moderates Earth's climate and has important roles in the water cycle, carbon cycle, and nitrogen cycle. Although the sea has been traveled and explored since prehistory, the modern scientific study of the sea—oceanography—dates broadly to the British Challenger expedition of the 1870s. The sea is conventionally divided into up to five large oceanic sections—including the International Hydrographic Organization's four named oceans (the Atlantic, Pacific, Indian, and Arctic) and the Southern Ocean; smaller, second-order sections, such as the Mediterranean, are known as seas. Owing to the present state of continental drift, the Northern Hemisphere is now fairly equally divided between land and sea (a ratio of about 2:3) but the South is overwhelmingly oceanic (1:4.7). Salinity in the open ocean is generally in a narrow band around 3.5% by mass, although this can vary in more landlocked waters, near the mouths of large rivers, or at great depths. About 85% of the solids in the open sea are sodium chloride. Deep-sea currents are produced by differences in salinity and temperature. Surface currents are formed by the friction of waves produced by the wind and by tides, the changes in local sea level produced by the gravity of the Moon and Sun.
Dolphins animals - dolphins
Bottlenose dolphin (Tursiops truncatus)
Bottlenose dolphin (Tursiops truncatus)

system
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Dolphins animals

Added yesterday by Jeżyna

12

Boulders and beach. - A cove with picturesque boulders on Zakynthos.
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Boulders and beach.

Added yesterday by Mila

38

Zakynthos - Greek island in the Ionian Sea, west of the Peloponnese, the third largest in the Ionian island arch
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Zakynthos

Added yesterday by Jeżyna

54

Lake in Nepal. - Pier on the lake in Nepal.
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Lake in Nepal.

Added 2 days ago by Zeta

29

New Zealand. - Auckland. New Zealand.
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New Zealand.

Added 2 days ago by Zeta

21

Mediterranean Sea. - Mediterranean sea from the island.
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Mediterranean Sea.

Added 2 days ago by Mila

25

Boats on the beach. - Boats on the beach in Sardinia.
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Boats on the beach.

Added 2 days ago by Zeta

24

Waves on the sea. - Waves, sea bay on Zakynthos.
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Waves on the sea.

Added 3 days ago by Mila

74

sunset - redo bigger fun
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sunset

Added 3 days ago by venere

76

love to the sunsets - here is another beautiful image you can reassemble it
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love to the sunsets

Added 4 days ago by helang

103

beautiful bridge - partially sunk a bridge
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beautiful bridge

Added 4 days ago by Beatrycze

18

Hot Hawaii. - Mountains. Water. Sun. Beach.
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Hot Hawaii.

Added 5 days ago by Grażyna

207

Hawaii.. - Beautiful Hawaii. Landscape.
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Hawaii..

Added 5 days ago by Grażyna

153

Our Baltic tropics. - Our Baltic tropics.
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Our Baltic tropics.

Added 5 days ago by Zeta

51

Boats at the wharf. - Boats at the wharf. Maldives.
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Boats at the wharf.

Added 5 days ago by Zeta

34

Whale shark. - Whale shark in the Maldives.
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Whale shark.

Added 5 days ago by Zeta

37

Paris by night - oj la la la la la la la
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Paris by night

Added 6 days ago by MAJAMA

57

Corfu. Greece. - Rugged cliffs on Corfu in Greece.
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Corfu. Greece.

Added 6 days ago by Zeta

43

Fishing boat. - Fishing boat in the Aegean Sea.
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Fishing boat.

Added 6 days ago by Zeta

69

Atlantic coast. - Atlantic coast. Sark. England.
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Atlantic coast.

Added week ago by Zeta

44 1

California Coast. - California. Anacapa Islands.
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California Coast.

Added week ago by Zeta

30

California Coast. - California Coast.
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California Coast.

Added week ago by Zeta

51

Norway. - Colorful houses in Norway.
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Norway.

Added week ago by Grażyna

38

West in the port - west at the port of Zakynthos
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West in the port

Added 9 days ago by Mila

48

Landscape - colorful jigsaw puzzle
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Landscape

Added 10 days ago by andi

79

Landscape - colorful jigsaw puzzle
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Landscape

Added 10 days ago by andi

40

Landscape - colorful jigsaw puzzle
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Landscape

Added 10 days ago by andi

97

Landscape - colorful jigsaw puzzle
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Landscape

Added 11 days ago by andi

61

landscape - yacht in the bay, sea, ocean
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landscape

Added 11 days ago by sandra

87

Lighthouse - beautifully wow, dry beats
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Lighthouse

Added 11 days ago by MAJAMA

67

Landscape - colorful jigsaw puzzle
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Landscape

Added 12 days ago by andi

451 4

Sunset - colorful jigsaw puzzle
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Sunset

Added 12 days ago by andi

143

Landscape - colorful jigsaw puzzle
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Landscape

Added 12 days ago by andi

51

Landscape - colorful jigsaw puzzle
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Landscape

Added 12 days ago by andi

61

Iceberg. - Blue iceberg.
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Iceberg.

Added 12 days ago by Zeta

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