All articles starting with H

Hipódromo de las Américas

Hipódromo de las Américas is a horse-racing track and large-format concert ground in Mexico City, opened in 1943, the only hippodrome in Mexico, known for the Derby México and major EDM events.

Oct 22, 2026

Hipolit Cegielski

Hipolit Cegielski (1813–1868) was a Polish philologist, teacher, journalist, and industrialist in Poznań, best known for founding the machine works that continue today as H. Cegielski – Poznań S.A.

Oct 22, 2026

Hipólito José da Costa

Hipólito José da Costa, also known as Hipólito da Costa, was a journalist and diplomat who founded the Correio Braziliense in London, recognized as the patron of Brazilian journalism.

Sep 24, 2026

Hipólito Unanue

Hipólito Unanue (1755–1833) was a Peruvian physician, scholar, and statesman born in Arica who served San Martín and Bolívar and is called the father of Peruvian medicine.

Hipólito Yrigoyen (Juan Hipólito del Sagrado Corazón de Jesús Yrigoyen, 1852–1933), co-founder of Argentina's Unión Cívica Radical and twice president (1916–1922, 1928–1930), first elected under the Sáenz Peña secret suffrage law, creator of YPF, overthrown by Uriburu's 1930 coup.

Hippalus (admiral)

Hippalus, also spelled Hippalos, is a navigator credited by the Periplus of the Erythraean Sea with first sailing straight to India on the monsoon winds.

Hipparchus (lunar crater)

Hipparchus is a large, heavily degraded Pre-Nectarian lunar impact crater in the central highlands, about 144 km across per USGS, named for the Greek astronomer Hipparchus, with the 30-km crater Horrocks on its floor.

Hipparchus (Martian crater)

Hipparchus (Martian crater): impact crater on Mars at 44.45S, 208.80E, 94.81 km diameter, officially named 1973 for the Greek astronomer Hipparchus; distinct from the lunar crater of the same name.

Hipparchus (Ἵππαρχος)

Hipparchus (Ἵππαρχος) was a Greek astronomer and mathematician born at Nicaea in Bithynia who discovered the precession of the equinoxes and is credited with the first known star catalog.

Oct 15, 2026

Hipparcos

Hipparcos (High Precision Parallax Collecting Satellite), a European Space Agency satellite launched in 1989, was the first space mission dedicated to astrometry, precisely measuring star positions and distances.

Hipparcos Catalogue

The Hipparcos Catalogue, also called the HIP catalog, is a star catalog of 118,218 entries with positions, parallaxes, and proper motions, published by ESA in 1997.

Hipparion

Hipparion, an extinct genus of three-toed hipparionine horses (tribe Hipparionini) that dispersed from North America to the Old World about 11.5 Mya, peaked in the Late Miocene, and declined through the Pliocene and Pleistocene.

Hippasus (ππασος)

Hippasus of Metapontum was an early Pythagorean philosopher active in the first half of the fifth century BCE, known for music theory and legends of a divulged secret.

Hippeastrum

Hippeastrum, also called knight's star or horticultural amaryllis, is a genus of about 70-90 bulbous Amaryllidaceae native to Central and South America, sold as Hippeastrum x hybridum, with hollow scapes and papery black seeds.

Hippie

Hippies were members of a 1960s-1970s countercultural movement rejecting mainstream American mores, centered on San Francisco's Haight-Ashbury, the 1967 Summer of Love, psychedelic music, communes, and opposition to the Vietnam War.

Hippie trail

Hippie trail: overland route from London or Amsterdam via Istanbul, Iran, Afghanistan, and Pakistan to India and Nepal, used by hundreds of thousands of young Western travellers from the mid-1960s until 1979, when the Iranian Revolution and Soviet invasion of Afghanistan closed it.

Oct 15, 2026

HiPPO (machine learning)

HiPPO (High-order Polynomial Projection Operator) is a machine learning framework that compresses signals and time series by projecting input history onto orthogonal polynomials, introduced at NeurIPS 2020.

Hippo Campus

Hippo Campus: Minnesota indie rock band formed 2013 in St. Paul by Jake Luppen, Nathan Stocker, Zach Sutton, and Whistler Allen; albums Landmark, Bambi, LP3, and Flood (2024, Psychic Hotline), over a billion streams.

Hippo Diarrhytus

Hippo Diarrhytus, also called Hippo Zaritus, was a Phoenician and Carthaginian port city on the northern coast of Tunisia, at the site of modern Bizerte, later a Roman colony.

Hippo Regius

Hippo Regius, also known as Hippone, was a Phoenician-Punic and Numidian royal city on the coast of modern Algeria, at Annaba, and Augustine's bishopric from 395 to 430.

Hippo Signaling Pathway

The Hippo signaling pathway is an evolutionarily conserved network that controls organ growth by regulating cell proliferation, survival, and differentiation; its dysfunction is linked to cancer.

Hippobosca longipennis

Hippobosca longipennis, the dog louse fly (Fabricius, 1805), a Hippoboscidae blood-feeding ectoparasite of dogs and wild carnivores native to Africa and the Middle East, vector of Acanthocheilonema dracunculoides and transport host of Cheyletiella yasguri.