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Otto von Habsburg (20 November 1912 4 July 2011) was the last crown prince of Austria-Hungary from 1916 until the dissolution of the empire in November 1918.

Otto von Habsburg (20 November 1912 4 July 2011) was the last crown prince of Austria-Hungary from 1916 until the dissolution of the empire in November 1918.

The grey-headed honeyeater (Ptilotula keartlandi) is a species of bird in the honeyeater family, Meliphagidae. It is endemic to Australia, where it has an extensive range covering much of the central arid and semi-arid areas of the continent.

The grey-headed honeyeater (Ptilotula keartlandi) is a species of bird in the honeyeater family, Meliphagidae. It is endemic to Australia, where it has an extensive range covering much of the central arid and semi-arid areas of the continent.

The Dust Bowl was a period of severe dust storms that greatly damaged the ecology and agriculture of the American and Canadian prairies during the 1930s. Drought and a failure to apply dryland farming methods to prevent wind erosion caused the phenomenon.

The Dust Bowl was a period of severe dust storms that greatly damaged the ecology and agriculture of the American and Canadian prairies during the 1930s. Drought and a failure to apply dryland farming methods to prevent wind erosion caused the phenomenon.

The Council of Clermont was a mixed synod of ecclesiastics and laymen of the Catholic Church, called by Pope Urban II and held from 17 to 27 November 1095 at Clermont, Auvergne, at the time part of the Duchy of Aquitaine.

The Council of Clermont was a mixed synod of ecclesiastics and laymen of the Catholic Church, called by Pope Urban II and held from 17 to 27 November 1095 at Clermont, Auvergne, at the time part of the Duchy of Aquitaine.

The African buffalo (Syncerus caffer) is a species of true buffalo in the Bovidae family. It is native to sub-Saharan Africa, where it is found in a number of disjoint ranges stretching from south-eastern Senegal through West and Central Africa to South Africa.

The African buffalo (Syncerus caffer) is a species of true buffalo in the Bovidae family. It is native to sub-Saharan Africa, where it is found in a number of disjoint ranges stretching from south-eastern Senegal through West and Central Africa to South Africa.

The pied-billed grebe (Podilymbus podiceps) is a species of water bird in the grebe family, Podicipedidae. It is found in ponds throughout the Americas, from Canada south to Argentina and Chile.

The pied-billed grebe (Podilymbus podiceps) is a species of water bird in the grebe family, Podicipedidae. It is found in ponds throughout the Americas, from Canada south to Argentina and Chile.

The Czapski Palace is a palatial complex in the center of Warsaw, Poland. It was constructed in about 1686 for the country's Catholic primate, Michał Stefan Radziejowski, using a design by Dutch-born Polish architect and engineer Tylman van Gameren.

The Czapski Palace is a palatial complex in the center of Warsaw, Poland. It was constructed in about 1686 for the country's Catholic primate, Michał Stefan Radziejowski, using a design by Dutch-born Polish architect and engineer Tylman van Gameren.

The Lockheed T-33 is an American subsonic jet trainer produced by Lockheed. It was manufactured between 1948 and 1959 with Lockheed producing a total of 5,691 and a further 866 built under licence by other manufacturers.

The Lockheed T-33 is an American subsonic jet trainer produced by Lockheed. It was manufactured between 1948 and 1959 with Lockheed producing a total of 5,691 and a further 866 built under licence by other manufacturers.

The large milkweed bug (Oncopeltus fasciatus) is a medium-sized hemipteran (true bug) in the family Lygaeidae. It is distributed throughout North America, from Central America through Mexico, the Caribbean and the United States, to southern Canada.

The large milkweed bug (Oncopeltus fasciatus) is a medium-sized hemipteran (true bug) in the family Lygaeidae. It is distributed throughout North America, from Central America through Mexico, the Caribbean and the United States, to southern Canada.

Kurt Vonnegut (November 11, 1922 – April 11, 2007) was an American author known for his satirical and darkly humorous novels. In a career spanning over 50 years, he published fourteen novels and three short story collections; further works were published after his death.

Kurt Vonnegut (November 11, 1922 – April 11, 2007) was an American author known for his satirical and darkly humorous novels. In a career spanning over 50 years, he published fourteen novels and three short story collections; further works were published after his death.

Buddha's hand (Citrus medica var. sarcodactylis), also known as the fingered citron, is a citron variety whose fruit is segmented into finger-like sections, resembling those seen on representations of the Buddha.

Buddha's hand (Citrus medica var. sarcodactylis), also known as the fingered citron, is a citron variety whose fruit is segmented into finger-like sections, resembling those seen on representations of the Buddha.

Kumaon is a revenue and administrative division in the Indian state of Uttarakhand. Historically known as Manaskhand and Kurmanchal, the Kumaon region has been ruled by several dynasties over the course of its history, most notably the Katyuri and the Chand.

Kumaon is a revenue and administrative division in the Indian state of Uttarakhand. Historically known as Manaskhand and Kurmanchal, the Kumaon region has been ruled by several dynasties over the course of its history, most notably the Katyuri and the Chand.

The Indian paradise flycatcher (Terpsiphone paradisi) is a medium-sized passerine bird in the family Monarchidae, the monarch flycatchers.

The Indian paradise flycatcher (Terpsiphone paradisi) is a medium-sized passerine bird in the family Monarchidae, the monarch flycatchers.

The Fraunhofer lines are a set of spectral absorption lines. They are dark absorption lines, seen in the optical spectrum of the Sun, and are formed when atoms in the solar atmosphere absorb light being emitted by the solar photosphere.

The Fraunhofer lines are a set of spectral absorption lines. They are dark absorption lines, seen in the optical spectrum of the Sun, and are formed when atoms in the solar atmosphere absorb light being emitted by the solar photosphere.

Mordançage is an alternative photographic technique developed in the 1960s that alters gelatin silver prints to give them a degraded effect.

Mordançage is an alternative photographic technique developed in the 1960s that alters gelatin silver prints to give them a degraded effect.

The eastern amberwing (Perithemis tenera) is a species of dragonfly in the family Libellulidae. It is very small, reaching a total length of no more than 25 millimetres (0.98 in). Males have orange or amber wings, and both sexes have a red pterostigma.

The eastern amberwing (Perithemis tenera) is a species of dragonfly in the family Libellulidae. It is very small, reaching a total length of no more than 25 millimetres (0.98 in). Males have orange or amber wings, and both sexes have a red pterostigma.

Linaria vulgaris, also known as the common toadflax, yellow toadflax, or butter-and-eggs, is a species of flowering plant in the family Plantaginaceae, native to Europe, Siberia and Central Asia. It has also been introduced to and is now common in North America.

Linaria vulgaris, also known as the common toadflax, yellow toadflax, or butter-and-eggs, is a species of flowering plant in the family Plantaginaceae, native to Europe, Siberia and Central Asia. It has also been introduced to and is now common in North America.

The black-throated green warbler (Setophaga virens) is a small songbird in the New World warbler family, Parulidae.

The black-throated green warbler (Setophaga virens) is a small songbird in the New World warbler family, Parulidae.

Oxybelis aeneus, commonly known as the Mexican vine snake or the brown vine snake, is a species in the family Colubridae, the colubrid snakes.

Oxybelis aeneus, commonly known as the Mexican vine snake or the brown vine snake, is a species in the family Colubridae, the colubrid snakes.

Le droit d'aînesse ("The Birthright") is an opéra bouffe composed by Francis Chassaigne. The original French libretto was written by Eugène Leterrier and Albert Vanloo, with an English-language version titled Falka translated and adapted by Henry Brougham Farnie.

Le droit d'aînesse ("The Birthright") is an opéra bouffe composed by Francis Chassaigne. The original French libretto was written by Eugène Leterrier and Albert Vanloo, with an English-language version titled Falka translated and adapted by Henry Brougham Farnie.

Lower Manhattan, also known as Downtown Manhattan, is the southernmost part of the New York City borough of Manhattan. The area is the historical birthplace of New York City and in the 17th and 18th centuries composed the entirety of the city.

Lower Manhattan, also known as Downtown Manhattan, is the southernmost part of the New York City borough of Manhattan. The area is the historical birthplace of New York City and in the 17th and 18th centuries composed the entirety of the city.

Theodore Roosevelt (October 27, 1858 – January 6, 1919) was the 26th president of the United States, serving from 1901 to 1909. Roosevelt previously was involved in New York politics, including serving as the state's 33rd governor for two years.

Theodore Roosevelt (October 27, 1858 – January 6, 1919) was the 26th president of the United States, serving from 1901 to 1909. Roosevelt previously was involved in New York politics, including serving as the state's 33rd governor for two years.

The grey-breasted partridge (Arborophila orientalis) is a bird species in the family Phasianidae. It is endemic to highland forest in the eastern salient of Java, Indonesia. Measuring 28 cm (11 in), the species is a stocky, short-legged bird.

The grey-breasted partridge (Arborophila orientalis) is a bird species in the family Phasianidae. It is endemic to highland forest in the eastern salient of Java, Indonesia. Measuring 28 cm (11 in), the species is a stocky, short-legged bird.

Human gaits are the various ways in which humans can move, either naturally or as a result of specialized training. In general, a gait is a manner of limb movements made by animals during locomotion.

Human gaits are the various ways in which humans can move, either naturally or as a result of specialized training. In general, a gait is a manner of limb movements made by animals during locomotion.

The Conspiracy of Claudius Civilis is an oil painting by the Dutch painter Rembrandt, produced around . It depicts an episode from Tacitus's Histories of the Batavian rebellion (), led by the one-eyed chieftain Claudius Civilis.

The Conspiracy of Claudius Civilis is an oil painting by the Dutch painter Rembrandt, produced around . It depicts an episode from Tacitus's Histories of the Batavian rebellion (), led by the one-eyed chieftain Claudius Civilis.

Pachygrapsus marmoratus, also known as the marbled crab, is a species in the family Grapsidae, the marsh crabs. The species is found in southern Europe and northern Africa, in the waters of the Black Sea, the Mediterranean Sea, and parts of the Atlantic Ocean.

Pachygrapsus marmoratus, also known as the marbled crab, is a species in the family Grapsidae, the marsh crabs. The species is found in southern Europe and northern Africa, in the waters of the Black Sea, the Mediterranean Sea, and parts of the Atlantic Ocean.

Bennu is a carbonaceous asteroid in the Apollo group. Discovered by the Lincoln Near-Earth Asteroid Research (LINEAR) project in 1999, it is named after Bennu, a bird of Egyptian mythology associated with the Sun, creation, and rebirth.

Bennu is a carbonaceous asteroid in the Apollo group. Discovered by the Lincoln Near-Earth Asteroid Research (LINEAR) project in 1999, it is named after Bennu, a bird of Egyptian mythology associated with the Sun, creation, and rebirth.

Tihar is a five-day Hindu festival of lights, celebrated in Nepal and parts of India (Sikkim, Darjeeling and Assam) by the Nepalese and Indian Gorkha people.

Tihar is a five-day Hindu festival of lights, celebrated in Nepal and parts of India (Sikkim, Darjeeling and Assam) by the Nepalese and Indian Gorkha people.

The crescent-faced antpitta (Grallaricula lineifrons) is a species of bird in the antpitta family, Grallariidae. It is found in scattered locations in the Andes, from southern Ecuador through to Colombia's Quindío Department.

The crescent-faced antpitta (Grallaricula lineifrons) is a species of bird in the antpitta family, Grallariidae. It is found in scattered locations in the Andes, from southern Ecuador through to Colombia's Quindío Department.