The historicity of King Arthur has been debated both by academics and popular writers. While there have been many suggestions that Arthur was a real historical person, academic historians today consider King Arthur to be a mythological or folkloric figure.

Bryozoa (also known as the Polyzoa, Ectoprocta or commonly as moss animals) are a phylum of aquatic invertebrate animals, nearly all living in sedentary colonies. Typically about 0.5 millimetres (1⁄64 inch) long, they have a special feeding structure called a lophophore, a crown of tentacles used for filter feeding. Most marine bryozoans live in tropical waters, but a few are found in oceanic trenches and polar waters. One class live only in freshwater environments, and a few members of a mostly marine class prefer brackish water. 5869 living species are known. One genus is solitary and the rest are colonial. The terms "Polyzoa" and "Bryozoa" were introduced a year apart, in 1830 and 1831 respectively. Soon after it was named, another group of animals was discovered whose filtering mechanism looked similar, so it was included in Bryozoa until 1869, when the two groups were noted to be very different internally. The new group was given the name "Entoprocta", while the original Bryozoa were called "Ectoprocta". Disagreements about terminology persisted well into the 20th Century, but "Bryozoa" is now the generally accepted term. Colonies take a variety of forms, including fans, bushes and sheets. Single animals, called zooids, live throughout the colony and are not fully independent. These individuals can have unique and diverse functions. All colonies have "autozooids", which are responsible for feeding, excretion, and supplying nutrients to the colony through diverse channels. Some classes have specialist zooids like hatcheries for fertilized eggs, colonial defence structures, and root-like attachment structures. Cheilostomata is the most diverse class of bryozoan, possibly because its members have the widest range of specialist zooids. Some colonies can creep very slowly by using spiny defensive zooids as legs. Cheliostomata also have mineralized exoskeletons and form single-layered sheets which encrust over surfaces. Each zooid consists of a "cystid", which provides the body wall and produces the exoskeleton, and a "polypide", which holds the organs. Zooids have no special excretory organs, and autozooids' polypides are scrapped when they become overloaded with waste products; usually the body wall then grows a replacement polypide. Their gut is U-shaped, with the mouth inside the crown of tentacles and the anus outside it. Zooids of all the freshwater species are simultaneous hermaphrodites. Although those of many marine species function first as males and then as females, their colonies always contain a combination of zooids that are in their male and female stages. All species emit sperm into the water. Some also release ova into the water, while others capture sperm via their tentacles to fertilize their ova internally. In some species the larvae have large yolks, go to feed, and quickly settle on a surface. Others produce larvae that have little yolk but swim and feed for a few days before settling. After settling, all larvae undergo a radical metamorphosis that destroys and rebuilds almost all the internal tissues. Freshwater species also produce statoblasts that lie dormant until conditions are favorable, which enables a colony's lineage to survive even if severe conditions kill the mother colony. Predators of marine bryozoans include sea slugs (nudibranchs), fish, sea urchins, pycnogonids, crustaceans, mites and starfish. Freshwater bryozoans are preyed on by snails, insects, and fish. In Thailand, many populations of one freshwater species have been wiped out by an introduced species of snail. A fast-growing invasive bryozoan off the northeast and northwest coasts of the US has reduced kelp forests so much that it has affected local fish and invertebrate populations. Bryozoans have spread diseases to fish farms and fishermen. Chemicals extracted from a marine bryozoan species have been investigated for treatment of cancer and Alzheimer's disease, but analyses have not been encouraging. Mineralized skeletons of bryozoans first appear in rocks from the Early Ordovician period, making it the last major phylum to appear in the fossil record. This has led researchers to suspect that bryozoans arose earlier but were initially unmineralized, and may have differed significantly from fossilized and modern forms. Early fossils are mainly of erect forms, but encrusting forms gradually became dominant. It is uncertain whether the phylum is monophyletic. Bryozoans' evolutionary relationships to other phyla are also unclear, partly because scientists' view of the family tree of animals is mainly influenced by better-known phyla. Both morphological and molecular phylogeny analyses disagree over bryozoans' relationships with entoprocts, about whether bryozoans should be grouped with brachiopods and phoronids in Lophophorata, and whether bryozoans should be considered protostomes or deuterostomes.

Libra (♎︎) is the seventh astrological sign in the Zodiac. It spans 180°–210° celestial longitude. The Sun transits this sign on average between September 23 (September equinox) and October 22. Under the sidereal zodiac, the Sun currently transits the constellation of Libra from approximately October 31 to November 22. The symbol of the scales is based on the Scales of Justice held by Themis, the Greek personification of divine law and custom. She became the inspiration for modern depictions of Lady Justice. The ruling planet of Libra is Venus. Libra is the only zodiac constellation represented by an inanimate object; with the other eleven signs represented by either an animal or mythological character.

On 1 October 2004, a bombing occurred at the Zainabia mosque in Sialkot, Punjab, Pakistan. Hundreds of Shia Muslims were attending Friday prayers in the mosque at the time. The improvised explosive device was hidden in a briefcase and exploded in the centre of the prayer hall. It killed at least 31 people and injured dozens of others. A second bomb weighing about twelve kilograms was found in a briefcase and defused by a bomb disposal squad.

The historicity of King Arthur has been debated both by academics and popular writers. While there have been many suggestions that Arthur was a real historical person, academic historians today consider King Arthur to be a mythological or folkloric figure. The first definite mention of Arthur appears in 829, where he is presented as a military leader fighting against the invading Saxons in 5th- to 6th-century Sub-Roman Britain at the Battle of Badon, written more than three centuries after the events depicted. He develops into a legendary figure in the Matter of Britain from the 12th century, following Geoffrey of Monmouth's influential but largely fictional Historia Regum Britanniae. Non-specialists continue to propose a variety of theories for a possible historical identity of Arthur: Artuir mac Áedán, a son of the 6th-century king of Dál Riata in modern Scotland; Ambrosius Aurelianus, who led a Romano-British resistance against the Saxons; Lucius Artorius Castus, a 2nd-century Roman commander of Sarmatian cavalry; the British king Riothamus, who fought alongside the last Gallo-Roman commanders against the Visigoths in an expedition to Gaul in the 5th century. Academic historians have not supported these hypotheses in the 21st century.