The Garden at Sainte-Adresse is an oil-on-canvas painting by the French impressionist painter, Claude Monet. It was painted in 1867 in the French resort town of Sainte-Adresse, where Monet was spending the summer. The models were probably Monet's father Adolphe, his cousin Jeanne Marguerite Lecadre, her father Adolphe Lecadre, and perhaps Lecadre's other daughter, Sophie, the woman seated with her back to the viewer. The painting is composed with flat horizontal bands of colour, which were reminiscent of Japanese colour wood-block prints. The Garden at Sainte-Adresse is now in the Metropolitan Museum of Art in New York City.Painting: Claude Monet
The blue petrel (Halobaena caerulea) is a small seabird in the family Procellariidae, the only member of its genus. It is distributed across the Southern Ocean but breeds at only six known sites, all close to the Antarctic Convergence zone. Its plumage is predominantly blue-grey, with an "M" banding across its top, which is similar to that of the closely-related prion. It also has a white-tipped tail. The blue petrel is 28 cm (11 in) in length with a wing span of 66 cm (26 in), and feeds predominantly on krill as well as other crustaceans, fish, and squid.Photograph: JJ Harrison
The roadside hawk (Rupornis magnirostris) is a relatively small bird of prey found in the Americas. A vocal species, it is often the most common raptor in its range. It has many subspecies, and although previously placed in the genus Buteo, it is now usually placed in the monotypic genus Rupornis. The roadside hawk is 31–41 cm (12–16 in) long and weighs 250–300 g (8.8–10.6 oz). Males are about 20% smaller than females, but otherwise the sexes are similar.
The Larsen Ice Shelf is a long ice shelf in the Weddell Sea, extending along the east coast of the Antarctic Peninsula. It is named after Norwegian explorer Carl Anton Larsen, who sailed along the ice front in 1893. Composed of a series of shelves along the coast, named with letters from A to G, since the mid-1990s the Larsen Ice Shelf has been disintegrating, with the collapse of Larsen B in 2002 being particularly dramatic. A large section of the Larsen C shelf broke away in July 2017 to form an iceberg known as A-68. The area of the whole Larsen Ice Shelf was formerly 33,000 square miles (85,000 km2), but today is only 26,000 square miles (67,000 km2).Photograph: NASA/John Sonntag
Christmas in Serbia is celebrated on 25 December in the Julian calendar, which currently corresponds to 7 January in the Gregorian calendar. The Serbian name for Christmas is Božić, which is the diminutive form of the word bog ("god"), and can be translated as "young god". Christmas is celebrated for three consecutive days, starting with Christmas Day, which the Serbs call the first day of Christmas. On these days, one is to greet another person by saying "Christ is Born," which should be responded to with "Truly He is Born".
This picture shows a typical Serbian Christmas meal with grilled pork, Olivier salad (also called Russian salad), dzadziki salad, red wine and Bajadera sweets.Photograph: Petar Milošević
Charles Catton (1728–1798) was an English painter of coaches, landscapes, animals and figures. Born in Norwich as one of possibly 35 children of his twice-married father, Catton was apprenticed to a London coach painter or carpenter by the name of Maxwell, and studied drawing at the St. Martin's Lane Academy. He became a member of the Society of Artists, and exhibited various pictures in its galleries in 1760–1764. He was a founding member of the Royal Academy and, in 1784, was master of the Worshipful Company of Painter-Stainers. He exhibited at the Academy from its foundation until the year of his death.
This picture is a self-portrait of Catton, dating from 1769.Painting: Charles Catton
This picture is a fresco titled The gentle and pensive maiden has the power to tame the unicorn, painted by Italian Domenichino in around 1604–1605. It is in the collection of the Palazzo Farnese in Rome.Painting: Domenichino
Gentiana acaulis, also known as the stemless gentian, is a species of flowering plant in the family Gentianaceae. It is native to central and southern Europe, from Spain east to the Balkans, growing in mountainous regions such as the Alps and Pyrenees. It is a perennial plant, growing up to a height of 10 centimetres (3.9 in) tall and forming a "mat" up to 50 centimetres (20 in) wide. The leaves are evergreen, and can be lanceolate, elliptical or obovate. The trumpet-shaped terminal flowers are blue with olive-green spotted longitudinal throats. A depiction of the Gentiana acaulis flower can be seen on the obverse side of the one cent Austrian euro coin.Photograph: Petar Milošević
A light-emitting diode (LED) is a semiconductorlight source that emits light when an electric current flows through it. When a current passes through the diode, which is formed of two different semiconductor materials, electrons are able to recombine with electron holes, releasing energy in the form of photons. This effect is called electroluminescence. The color of the light is determined by the energy required for electrons to cross the band gap of the semiconductor. White light is obtained by using multiple semiconductors or a layer of light-emitting phosphor on the semiconductor device. The earliest practical LEDs, which appeared in 1962, emitted low-intensity infrared and red light. Modern LEDs are available with high output in a range of visible, ultraviolet, and infrared wavelengths.
This picture shows three different views of an 11×44 LED matrix lapel name tag display. The top image is of a little over half of the display, the center image is a close-up of the LEDs in ambient light, and the bottom image is the LEDs in their own red light.Photograph: Janke
Thomas Linley the elder (17 January 1733 – 19 November 1795) was an English bass singer and musician. He began his musical career at age 11 in Bath, becoming apprentice to the organist Thomas Chilcot. Linley married in 1752 and fathered eight children, supporting the family by working as a music teacher. As his children grew he developed their musical talent and was able to draw an increasing amount of income from their concerts. When the Bath Assembly Rooms opened in 1771, Linley became musical director and continued to promote his children's careers. He was eventually able to move to London with the thousands of pounds which he had amassed from their concerts. In addition to his children Linley taught tenor Charles Dignum, singer and actress Anna Maria Crouch, and novelist Frances Sheridan. He collaborated with his son Thomas Linley the younger in penning the comic opera The Duenna, with libretto by his son-in-law Richard Brinsley Sheridan.
When a liquid drop impacts the surface of a liquid reservoir it can float, bounce, coalesce with the reservoir, or splash. A floating drop remains on the surface for several seconds. Drop bouncing can occur on perturbed liquid surfaces. If the drop is able to rupture the thin film of gas which separates it from the liquid reservoir, it can coalesce. Additionally, higher Weber number drop impacts produce splashing. In the splashing regime, the impacting drop creates a crater in the fluid surface, followed by a crown around the crater. Finally, a central jet, called the "Rayleigh jet" or "Worthington jet", protrudes from the center of the crater. If the impact energy is high enough, the jet rises to the point where it pinches off, sending one or more droplets upward out of the surface.Photograph: José Manuel Suárez
The curlew sandpiper (Calidris ferruginea) is a small wader that breeds on the tundra of Arctic Siberia. It is a strongly migratory bird, wintering mainly in Africa, but also in Australia, New Zealand, and south and southeast Asia. The curlew sandpiper is similar to the dunlin, and has a length of 18–23 cm (7.1–9.1 in) and wingspan of 38–41 cm (15–16 in). In breeding season it has a bright red underside. This picture shows a curlew sandpiper in Thailand, with its winter plumage.Photograph: JJ Harrison
Hyperglide is the name given by cycling component manufacturer Shimano to a sprocket design in their bicycle derailleur tooth cassette systems. The design improves on their earlier Uniglide design (which used beveled/twisted gear teeth instead of ramps), and was introduced as part of a commercially viable index shifting system. The individual sprockets on a Hyperglide cassette or freewheel are designed specifically to work with their neighbours. In order to ensure alignment of each sprocket with its neighbour, the freehub has a narrow spline at one position, and each sprocket has a corresponding wide tooth on its inside face.Photograph: Petar Milošević
Gustav III (24 January [O.S. 13 January] 1746 – 29 March 1792) was King of Sweden from 1771 until his assassination in 1792. Born in Stockholm as the eldest son of King Adolf Frederick, he married Sophia Magdalena of Denmark in 1766. At the time of his accession, the Swedish Riksdag held more power than the monarchy but was bitterly divided between rival parties. After unsuccessful attempts to mediate, Gustav seized power himself in 1772, changing the constitution in what is considered a coup d'état. Following an attempt to form a league of princes to counter the French Revolution, a conspiracy formed among Swedish nobles and he was shot while attending the opera. He died two weeks later and was succeeded by his son Gustav Adolf.
Samanea saman, also known as the rain tree or Albizia saman, is a species of flowering tree in the pea family, Fabaceae, that is native to Central and South America. It is a wide-canopied tree with a large umbrella-shaped crown, and usually reaches a height of 15–25 m (49–82 ft) with a diameter of 30 m (98 ft). The tree has pinkish flowers with white and red stamens, set on heads with around 12–25 flowers per head. These heads may number in the thousands, covering the whole tree.Photograph: Basile Morin
Sonar, an acronym for SOund NAvigation (and) Ranging, is a technique that uses sound propagation to communicate with or detect objects on or under the surface of a body of water. The first recorded use of the technique was by Leonardo da Vinci in 1490 via a tube inserted into the water to detect vessels by ear. Sonar equipment was developed during World War I to counter the growing threat of submarine warfare; an operational passive sonar system, which only listens for the sound of vessels, was in use by 1918. Modern active sonar systems use an acoustic transponder to generate a sound wave which is then reflected back from target objects.
This picture shows a sonar image of the Soviet Navy minesweeper T-297, formerly the Latvian Virsaitis, that was shipwrecked on 3 December 1941 in the Gulf of Finland.Image: Tuukritööde OÜ