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News tagged with islands

Research group suggests Madagascar's unique animals arrived on rafts

(PhysOrg.com) -- Ever since the island of Madagascar was first visited by people, some two thousand years ago, there has been speculation about the unique plants and animals that live on the world’s ...

Biology / Plants & Animals

created Mar 20, 2012 | popularity 4.3 / 5 (4) | comments 0 | with audio podcast report

Genetic analysis shows tortoise species thought to be extinct for 150 years still lives

Dozens of giant tortoises of a species believed extinct for 150 years may still be living at a remote location in the Galapagos Islands, a genetic analysis conducted by Yale University researchers reveals.

Biology / Plants & Animals

created Jan 09, 2012 | popularity 4.6 / 5 (11) | comments 2 | with audio podcast

Ocean currents speed melting of Antarctic ice

Stronger ocean currents beneath West Antarctica's Pine Island Glacier Ice Shelf are eroding the ice from below, speeding the melting of the glacier as a whole, according to a new study in Nature Geoscience. A grow ...

Space & Earth / Earth Sciences

created Jun 26, 2011 | popularity 3.9 / 5 (9) | comments 24 | with audio podcast

Scientists find odd twist in slow 'earthquakes': Tremor running backwards

Earthquake scientists trying to unravel the mysteries of an unfelt, weeks-long seismic phenomenon called episodic tremor and slip have discovered a strange twist. The tremor can suddenly reverse direction ...

Space & Earth / Earth Sciences

created May 22, 2011 | popularity 4.8 / 5 (9) | comments 2 | with audio podcast

Virus-eating virus identified in Antarctic lake

(PhysOrg.com) -- Deep within the waters of Antarctica's Organic Lake an Australian research team, led by microbiologist Ricardo Cavicchioli from the University of New South Wales, have discovered a new virophage, or virus ...

Biology / Cell & Microbiology

created Mar 29, 2011 | popularity 5 / 5 (20) | comments 4 report

Bats: What sounds good doesn't always taste good

Bats use a combination of cues in their hunting sequence - capture, handling and consumption - to decide which prey to attack, catch and consume and which ones they are better off leaving alone or dropping ...

Biology / Plants & Animals

created May 21, 2012 | popularity 5 / 5 (1) | comments 0 | with audio podcast

Big-mouthed babies drove the evolution of giant island snakes

Some populations of tiger snakes stranded for thousands of years on tiny islands surrounding Australia have evolved to be giants, growing to nearly twice the size of their mainland cousins. Now, new research ...

Biology / Plants & Animals

created May 15, 2012 | popularity 5 / 5 (3) | comments 5 | with audio podcast

The oldest farming village in the Mediterranean islands is discovered in Cyprus

The oldest agricultural settlement ever found on a Mediterranean island has been discovered in Cyprus by a team of French archaeologists involving CNRS, the National Museum of Natural History, INRAP, EHESS ...

Other Sciences / Archaeology & Fossils

created May 15, 2012 | popularity 4.1 / 5 (12) | comments 3 | with audio podcast

Researchers say they have new clue to Lost Colony

(AP) -- A new look at a 425-year-old map has yielded a tantalizing clue about the fate of the Lost Colony, the settlers who disappeared from North Carolina's Roanoke Island in the late 16th century.

Other Sciences / Archaeology & Fossils

created May 04, 2012 | popularity 3.4 / 5 (9) | comments 0

Pacific islands may become refuge for corals in a warming climate, study finds

Scientists have predicted that ocean temperatures will rise in the equatorial Pacific by the end of the century, wreaking havoc on coral reef ecosystems. But a new study shows that climate change could cause ocean currents ...

Space & Earth / Environment

created Apr 29, 2012 | popularity 3.7 / 5 (3) | comments 3 | with audio podcast

West Antarctic ice shelves tearing apart at the seams

A new study examining nearly 40 years of satellite imagery has revealed that the floating ice shelves of a critical portion of West Antarctica are steadily losing their grip on adjacent bay walls, potentially ...

Space & Earth / Earth Sciences

created Mar 27, 2012 | popularity 4.9 / 5 (18) | comments 2 | with audio podcast

Huge hamsters and pint-sized porcupines thrive on islands

From miniature elephants to monster mice, and even Hobbit-sized humans, size changes in island animals are well-known to science. Biologists have long believed that large animals evolving on islands tend to get smaller, while ...

Biology / Plants & Animals

created Mar 23, 2012 | popularity 4.3 / 5 (3) | comments 2 | with audio podcast

An extinct species of scops owl has been discovered in Madeira

An international team of scientists, including some from Majorca and the Canary Islands, have described a new type of fossil scops owl, the first extinct bird on the archipelago of Madeira (Portugal). Otus ma ...

Biology / Plants & Animals

created Mar 23, 2012 | popularity 5 / 5 (3) | comments 0 | with audio podcast

Santorini: The ground is moving again in paradise

Do a Google image search for "Greece." Before you find pictures of the Parthenon or Acropolis, you'll see several beautiful photos of Santorini, the picturesque island in the Aegean Sea. The British Broadcasting ...

Space & Earth / Earth Sciences

created Mar 13, 2012 | popularity 3.8 / 5 (8) | comments 1 | with audio podcast

Evidence suggests Neanderthals took to boats before modern humans

(PhysOrg.com) -- Neanderthals, considered either a sub-species of modern humans or a separate species altogether, lived from approximately 300,000 years ago to somewhere near 24,000 years ago, when they inexplicably ...

Other Sciences / Archaeology & Fossils

created Mar 01, 2012 | popularity 4.9 / 5 (15) | comments 31 | with audio podcast report

Island

An island (pronounced /ˈaɪlənd/) or isle (/ˈaɪl/) is any piece of land that is surrounded by water. Very small islands such as emergent land features on atolls are called islets. A key or cay is another name for a small island or islet. An island in a river or lake may be called an eyot, /ˈaɪ.ət/. There are two main types of islands: continental islands and oceanic islands. There are also artificial islands. A grouping of geographically and/or geologically related islands is called an archipelago.

The word island comes from Old English ī(e)gland (literally, "watery land"). However, the spelling of the word was modified in the 15th century by association with the etymologically unrelated Old French loanword isle.

There is no standard of size which distinguishes islands from islets and continents.

When defining islands as pieces of land that are surrounded by water, narrow bodies of water like rivers and canals are often, but not always, left out of consideration[citation needed]. For instance, in France the Canal du Midi connects the Garonne river to the Mediterranean Sea, thereby completing a continuous water connection from the Atlantic Ocean to the Mediterranean Sea. So technically, the land mass that includes the Iberian Peninsula and the part of France that is south of the Garonne River and the Canal du Midi is surrounded by water. For a completely natural example, the Orinoco River splits into two branches near Tamatama, in Amazonas state, Venezuela. The southern branch flows south and joins the Rio Negro, and then the Amazon. Thus, all of the Guianas (Guyana, Suriname, and French Guiana) and substantial parts of Brazil and Venezuela are surrounded by (river or ocean) water. These instances are not generally considered islands. However, small pieces of land bordered by rivers are considered islands.

This also helps explain why Africa-Eurasia can be seen as one continuous landmass (and thus technically the biggest island): generally the Suez Canal is not seen as something that divides the land mass in two. The mainland of Australia is often considered the largest island because it is covered on all sides by water while not being connected to another body of land.

On the other hand, an island may still be described as such despite the presence of a land bridge, e.g., Singapore and its causeway or the various Dutch delta Islands, such as IJsselmonde. Some places may even retain "island" in their names after being connected to a larger landmass by a wide land bridge, such as Coney Island. The retaining of the island description may therefore be to some degree simply due to historical reasons - though the land bridges are often of a different geological nature (for example sand instead of stone), and thus the islands remain islands in a more scientific sense as well.

For more information about Island, read the full article at Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.

Related topics: species