Wikipedia:Picture of the day/April 2006

These featured pictures, as scheduled below, appeared as the picture of the day (POTD) on the English Wikipedia's Main Page in April 2006.

You can add an automatically updating POTD template to your user page using {{Pic of the day}} (version with blurb) or {{POTD}} (version without blurb). For instructions on how to make custom POTD layouts, see Wikipedia:Picture of the day.Purge server cache

Picture of the day
	language isolates and unclassified languages . Map credit: Ish ishwar Archive - Nominate new image

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A waterfall is usually a geological formation resulting from water, often in the form of a stream flowing over an erosion-resistant rock formation that forms a sudden break in elevation. Waterfalls may also be artificial, and they are sometimes used for garden and landscape ornaments. Some waterfalls form in mountain environments where erosion is rapid and stream courses may be subject to sudden and catastrophic change. Photo credit: Diliff Archive - Nominate new image

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	The Buddha. Mathematically, the set consists of the set of points c in the complex number plane for which the iteratively defined sequence ${\displaystyle z_{n+1}={z_{n}}^{2}+c}$ with z0 = 0 does not tend to infinity. Photo credit: Evercat Archive - Nominate new image

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	A gamelan is a kind of musical ensemble of Indonesian origin typically featuring metallophones, xylophones, drums, and gongs. The term can be used to refer either to the set of instruments or the players of those instruments. Traditionally, "gamelan" comes from the Javanese word "gamel", meaning hammer. Photo credit: Fir0002 Archive - Nominate new image

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Oil-on-panel portrait of Sir Thomas More by Hans Holbein the Younger (1527) Thomas More was a Catholic religious convictions and fell into disfavour with Henry VIII over his refusal to accept Henry as the head of the Church of England. This in turn lead to More's execution at the Tower of London in 1535. On the 400th anniversary of his execution, More was declared a Saint . Photo credit Archive - Nominate new image

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	Apollo program and was the sixth and last mission to date to land on the Moon . It was the first night launch, and the final mission, of the Apollo program. Photo credit: NASA Archive - Nominate new image

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Picture of the day
	dominant trait. There are several varieties of polydactyly; this X-ray photograph shows a left hand with middle ray duplication. In Western societies, the additional digits are usually surgically removed during early life. Photo credit: Drgnu23 and Grendelkhan Archive - Nominate new image

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	The Pleiades (also known as M45 or the Seven Sisters) is an open cluster in the constellation of Taurus. It is among the nearest to the Earth of all open clusters, probably the best known and certainly the most striking to the naked eye . Photo credit: NASA Archive - Nominate new image

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The Plumed Basilisk (Basiliscus plumifrons) is a species of lizard native to Latin America. Its natural range covers a swath from Mexico to Ecuador . Plumed basilisks are opossums and snakes . Plumed Basilisks are noted for a remarkable ability to, in an attempt to evade possible threats, run across bodies of water using their extremely fast-moving, large, webbed feet. Photo credit: Marcel Burkhard (cele4) Archive - Nominate new image

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A TRACE image of sunspots on the surface, or photosphere, of the sun from September 2002, is taken in the far ultraviolet on a relatively quiet day for solar activity. However, the image still shows a large sunspot group visible as a bright area near the horizon. Although sunspots are relatively cool regions on the surface of the sun, the bright glowing gas flowing around the sunspots have a temperature of over one million °C (1.8 million °F). The high temperatures are thought to be related to the rapidly changing magnetic field loops that channel solar plasma. Photo credit: NASA/TRACE Archive - Nominate new image

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	entertainers . Geisha were very common in the 18th and 19th centuries, and are still in existence today, although their numbers are dwindling. Geisha take lessons in several arts forms for most of their lives, not for just entertaining customers but for a lifetime of learning. Photo credit: ToddLara Archive - Nominate new image

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	Kilauea, Hawaii. Expanding gases in the lava fountain tears the liquid rock into irregular globs that fall back to earth, forming a heap around the vent. The still partly liquid rock splashing down and over the sides of the developing mound is called spatter. Photo credit: G.E. Ulrich of the United States Geological Survey Archive - Nominate new image

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The activation energy in chemistry and biology is the threshold energy, or the energy that must be overcome in order for a chemical reaction to occur. Activation energy may otherwise be denoted as the minimum energy necessary for a specific chemical reaction to occur. The sparks generated by striking steel against flint provide the activation energy to initiate combustion in this bunsen burner. The blue flame will sustain itself after the sparks are extinguished because the continued combustion of the flame is now energetically favorable. Photo credit: Debivort Archive - Nominate new image

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	The silken cocoon and metamorphosing into the adult moth. Photo credit: Fir0002 Archive - Nominate new image

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Monarch butterflies are especially noted for their massive southward migrations from August through October. Female Monarch butterflies deposit eggs for the next generation during these migrations. The population east of the Rocky Mountains overwinters in Michoacán, Mexico, and the western population overwinters in various sites in central coastal California. The length of these journeys far exceeds the lifetime of any given butterfly. How the species manages to return to the same overwintering spots over a gap of several generations is still subject of research. Photo credit: drumguy8800 Archive - Nominate new image

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	The true seal of the Northern Hemisphere. Having the widest range of all pinnipeds, Harbor seals are found in coastal waters of the northern Atlantic and Pacific Oceans as well as those of the Baltic and North Seas . Photo credit: Marcel Burkhard (cele4) Archive - Nominate new image

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The Eiffel Tower in Paris is one of the world's most recognizable buildings and a symbol of France. The 300 m (986 ft) high tower was designed by Gustave Eiffel as a gateway to the Exposition Universelle of 1889. It was the world's tallest structure for forty years. Eiffel used his experience in building railway bridges when designing the tower, prefabricating the 18,038 wrought iron pieces off site then assembling the pieces with the help of 300 workers. Photo credit: Tristan Nitot Archive - Nominate new image

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	linear perspective. They are often seen through sunlight shining through holes or breaks in cloud cover . Photo credit: Fir0002 Archive - Nominate new image

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The memorial to the members of all its armed forces and supporting organizations who have died in the wars of the Commonwealth of Australia. The Memorial is located in Australia's capital, Canberra. It is the northern terminus of the city's ceremonial land axis, which stretches from Parliament House on Capital Hill along a line passing through the summit of the cone-shaped Mt Ainslie to the northeast. Photo credit: Fir0002 Archive - Nominate new image

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	The Blue Mountains of New South Wales, Australia. They are close to the town of Katoomba and are one of the Blue Mountains' most famous sights, towering 900m (≈2953 ft) above the Jamison Valley . Their names are Wimlah, Meehni and Gunnedoo. Photo credit: Diliff Archive - Nominate new image

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shipping, and locomotive engines, as well as manufacturing and other sources. Photo credit: Diliff Archive - Nominate new image

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	At the commissioned officers celebrate their new positions by throwing their midshipmen covers into the air as part of the graduation and commissioning ceremony. The "hat toss" has been a traditional ending to the ceremony at the Academy since 1912 . Photo credit: Photographer's Mate 2nd Class Daniel J. McLain, USN Archive - Nominate new image

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	The Victoria, coastal and sub-coastal New South Wales, and Queensland as far north as the Brisbane area, and also in Tasmania . Superb Fairy-wrens occupy wide range of habitat types, and are found in almost any area that has at least a little dense undergrowth for them to shelter in. Photo credit: LiquidGhoul Archive - Nominate new image

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	The strange attractor; this was proven by W. Tucker in 2001. The strange attractor in this case is a fractal of Hausdorff dimension between 2 and 3. Grassberger (1983) has estimated the Hausdorff dimension to be 2.06 ± 0.01 and the correlation dimension to be 2.05 ± 0.01. Photo credit: Wikimol Archive - Nominate new image

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The visible light, looking back in time more than 13 billion years. The HUDF contains an estimated 10,000 galaxies. The patch of sky in which the galaxies reside (just one-tenth the diameter of the full moon ) was chosen because of the low density of bright stars. Although most of the targets visible in the Hubble image can also be seen at infrared wavelengths by ground-based telescopes, Hubble is the only instrument which can make observations of these distant targets at visible wavelengths. Photo credit: NASA Archive - Nominate new image

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The Colorado River. The San Juan and Uncompahgre National Forest cover a large portion of the San Juan Mountains. Photo credit: Debivort Archive - Nominate new image

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	formations that together represent 150 million years of mostly Mesozoic-aged sedimentation . At various periods in that time, warm, shallow seas, streams, ponds and lakes, vast deserts and dry near-shore environments covered the area. Photo credit: Diliff Archive - Nominate new image

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A tapped winding and, in most cases, a magnetic core to concentrate the flux. An alternating current in one winding creates a time-varying magnetic flux in the core, which induces a voltage in the other windings. Transformers are used to convert between high and low voltages, to change impedance, and to provide electrical isolation between circuits . Photo credit: BillC Archive - Nominate new image

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Tempel 1. At 5:52 UTC on July 4, 2005, one section of the Deep Impact probe successfully impacted the comet's nucleus , excavating debris from the interior of the nucleus. Photographs of the impact showed the comet to be more dusty and less icy than expected. The impact generated a large, bright dust cloud that obscured the hoped-for view of the impact crater. Photo credit: NASA Archive - Nominate new image

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Six F-16 Fighting Falcons with the U.S. Air Force Thunderbirds aerial demonstration team fly in delta formation in front of the Empire State Building during an air show. The F-16 Fighting Falcon is a modern multi-role jet fighter aircraft built in the United States . Designed as a lightweight fighter, it evolved into a successful multi-role aircraft, and is serving 24 countries. Photo credit: Tech. Sgt. Sean Mateo White, USAF Archive - Nominate new image

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