Year 1068 was a leap year starting on Tuesday of the Julian calendar. January 1 – Empress Eudokia Makrembolitissa, wife of the late Emperor Constantine X, marries General Romanos Diogenes –, proclaimed co-emperor as Romanos IV of the Byzantine Empire. Autumn – Romanos IV begins a campaign against the Seljuk Turks, leading a Byzantine expeditionary force, he is successful in recapturing the fortress city of Hieropolis near Aleppo in northern Syria. Winter – Romanos IV leaves a portion of his army as a rear guard at Melitene; the Byzantine garrison fails to check an Seljuk raid. Romanos winters near Aleppo before returning to Constantinople. Norman conquest of southern Italy: Norman forces under Robert Guiscard lay siege to the Byzantine city of Bari. Battle of the Alta River: The Cumans defeat the Kievan Rus' forces of Grand Prince Iziaslav I, his brothers Sviatoslav II and Vsevolod I. Kiev Uprising: The city of Kiev rebels against Iziaslav I, in the aftermath of the Kievan Rus' defeat against the Cumans.

Siege of Exeter: Norman forces under King William I take the city of Exeter after an siege of 18-days. William I begins a campaign in the East Midlands to put down the rebellions at Nottingham, Stafford and York. Edgar the Ætheling takes refuge with King Malcolm III of Scotland along with Edgar's sister Margaret, who marries King Malcolm. May 11 – William I brings his wife Matilda of Flanders to England, she is crowned queen in Westminster Abbey. September – Zaynab an-Nafzawiyyah marries Abu Bakr ibn Umar, leader of the Almoravids, becomes his queen an co-regent. Spring – Emperor Yi Zong of the Western Xia dies after a 19-year reign, he is succeeded by his 7-year-old son Hui Zong. May 22 – Emperor Go-Reizei dies after a 23-year reign, leaving no direct heirs to the throne, he is succeeded by his brother Go-Sanjō as the 71st emperor of Japan. March 18 – An earthquake affects the Near East, with a maximum Mercalli intensity of IX; the shock has a magnitude greater than 7, leaves about 20,000 people dead.

August 1 – Taizu, emperor of the Jin Dynasty Abu al-Salt, Moorish astronomer and polymath Ermengarde of Anjou, duchess of Aquitaine and Brittany Haakon Magnusson, king of Norway Henry I, king of England Peter I, king of Aragon Robert de Ferrers, 1st Earl Derby January 11 – Egbert I, margrave of Meissen May 22 – Go-Reizei, emperor of Japan November 10 – Agnes of Burgundy, duchess of Aquitaine Abulchares, Byzantine general and catepan Ali ibn Yusuf al-Ilaqi, Persian physician Argyrus, Lombard nobleman and general Böritigin, ruler of Transoxiana Choe Chung, Korean Confucian scholar Eadnoth the Constable, English landowner Ephraim ibn al-Za'faran, Jewish physician Ralph the Staller, English nobleman William IV, French nobleman William of Montreuil, Italo-Norman duke Yi Zong, emperor of Western Xia

This is a collection of lists of organisms by their population. While most of the numbers are estimates, they have been made by the experts in their fields. Species population is a science falling under the purview of population biogeography. Individuals are counted by census. More than 99 percent of all species, amounting to over five billion species, that lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described. According to another study, the number of described species has been estimated at 1,899,587. 2000–2009 saw 17,000 species described per year. The total number of undescribed organisms is unknown, but marine microbial species alone could number 20,000,000; the number of quantified species will ipso facto always lag behind the number of described species, species contained in these lists tend to be on the K side of the r/K selection continuum.

More in May 2016, scientists reported that 1 trillion species are estimated to be on Earth with only one-thousandth of one percent described. The total number of related DNA base pairs on Earth is estimated at 5.0 x 1037 and weighs 50 billion tonnes. In comparison, the total mass of the biosphere has been estimated to be as much as 4 TtC. In July 2016, scientists reported identifying a set of 355 genes from the Last Universal Common Ancestor of all organisms living on Earth, it is estimated that the most numerous bacteria are of a species of the Pelagibacterales clade Pelagibacter ubique, the most numerous viruses are bacteriophages infecting these species. It is estimated; the Deep Carbon Observatory has been exploring living forms in the interior of the Earth. "Life in deep Earth totals 15 to 23 billion tons of carbon". Mammals by population Artiodactyla Carnivora Cetacea Chiroptera Perissodactyla Primates Birds by population Anseriformes Apodiformes Caprimulgiformes Charadriiformes Ciconiiformes Columbiformes Coraciiformes Cuculiformes Falconiformes Galliformes The domesticated chicken, a Galliform, has an estimated population of 23.7 billion, higher than any other bird.

Gaviiformes Gruiformes Passeriformes Pelecaniformes Phoenicopteriformes Piciformes Podicipediformes Procellariiformes Psittaciformes Sphenisciformes Strigiformes Struthioniformes Tinamiformes Trogoniformes There are an estimated 3,500,000,000,000 fish in the ocean. In the last 100 years, the number of small fish – such as pilchards, anchovies and sardines – has more than doubled, it is caused by a major decline in big ‘predator fish’ such as sharks and cod due to over-fishing. Recent figures indicate. An article in The New York Times claimed that the world holds 300 pounds of insects for every pound of humans. Ants have colonised every landmass on Earth, their population is estimated as 1016–1017. According to NASA in 2005, there were over 400 billion trees on our globe. However, more in 2015, using better methods, the global tree count has been estimated at about 3 trillion. Other studies show that the Amazonian forest alone yields 430 billion trees. Extrapolations from data compiled over a period of 10 years suggest that greater Amazonia, which includes the Amazon Basin and the Guiana Shield, harbors around 390 billion individual trees

Peyrat-la-Nonière is a commune in the Creuse department in the Nouvelle-Aquitaine region in central France. An area of farming and forestry and streams comprising the village and several hamlets situated by the banks of the river Voueize, some 10 miles north of Aubusson, at the junction of the D4, D54 and the D993 roads; the river Tardes forms most of the commune's eastern border. The church, dating from the twelfth century; the remains of the abbey de Bonlieu. The castle of Chiroux; the two châteaux, du Mazeau and la Voreille. A sixteenth-century chapel. An ancient stone bridge over the river Tardes. Communes of the Creuse department Creuse INSEE Official website of Peyrat-la-Nonière Peyrat-la-Nonière on the Quid website