Wikipedia:Today's featured article

Illustration of the value of π

The number π (pi) is a mathematical constant, approximately equal to 3.14159, that is the ratio of a circle's circumference to its diameter. It is an irrational number, meaning that it cannot be expressed exactly as a ratio of two integers, though it is sometimes approximated as ⁠22/7⁠. Its decimal representation never ends, nor does it enter a permanently repeating pattern. The digits of π appear to be evenly distributed, but no proof of this conjecture has been found. It appears in many formulae in mathematics and physics, and for thousands of years mathematicians have computed its value with increasing accuracy. Since the late 20th century, mathematicians and computer scientists have extended the decimal representation of π to many trillions of digits. Many equations from trigonometry and geometry rely on π, especially those concerning circles and spheres. A transcendental number, π is one of the most widely known mathematical constants. (Full article...)

Coin depicting Zenobia as empress

Zenobia (c. 240 – c. 274) was the queen of the Palmyrene Empire. Her husband Odaenathus became king in 260 and elevated Palmyra's power in the Near East by defeating the Sassanians and stabilizing the Roman East. After his assassination, she became the regent of her son Vaballathus and held de facto power throughout his reign. In 270, Zenobia launched an invasion which brought most of the Roman East under her sway, culminating with the annexation of Egypt. In reaction to Roman emperor Aurelian's campaign in 272, Zenobia declared Palmyra's secession from Rome, naming her son emperor and assuming the title of empress. The Romans were victorious after heavy fighting; the queen was besieged in her capital and captured by Aurelian. He exiled her to Rome, where she spent the remainder of her life. Zenobia fostered a multicultural and intellectual environment in her court, which was open to scholars and philosophers. Her biography has inspired historians, artists and novelists. (Full article...)

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Yan Ruisheng is a 1921 Chinese silent film directed by Ren Pengnian, starring Chen Shouzi and Wang Caiyun. A docudrama based on the murder of Wang Lianying the previous year, it follows a young man named Yan Ruisheng who kills a courtesan to steal her jewellery. When the crime is discovered, he and his accomplices flee, but Yan is captured and executed. China's first full-length feature film,Yan Ruisheng was produced as domestic short films were becoming increasingly common. It emphasized accuracy to real life in its casting and setting; the stars were chosen based on their physical resemblance to those involved, while extensive use of location shooting allowed scenes to be set in places associated with the murder. A commercial success upon release, the critical reception of its technical aspects was positive but the subject matter was challenged and the film faced several calls for banning.The film is thought to be lost. (Full article...)