All articles starting with H
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Houthi attacks on commercial vessels
Houthi attacks on commercial vessels: Iran-backed Yemeni campaign of missile, drone, and boarding assaults on Red Sea and Gulf of Aden shipping from 19 November 2023 (Galaxy Leader seizure), citing Gaza solidarity, forcing Cape of Good Hope reroutes and prompting US-UK strikes and UN Resolution 2722.
Houthi movement
The Houthi movement, formally known as Ansar Allah, is a Zaydi Shia insurgent movement from northern Yemen that has governed Sana'a and much of western Yemen since taking the capital in 2014.
Houthi takeover in Yemen
The Houthi takeover in Yemen (September 2014) was Ansar Allah's seizure of Sanaa with Saleh-loyalist army units, followed by Hadi's January 2015 resignation, the Saudi-led intervention of March 2015, and a decade of divided rule.
Houthi-controlled Yemen
Houthi-controlled Yemen: northern and western Yemen including Sanaa, held since 2014 by Iran-backed Ansar Allah (the Houthis), a Zaidi-rooted movement ruling as de facto authority against the Aden-based internationally recognized government.
Houthis in the 2026 Iran war
Houthis in the 2026 Iran war: Ansar Allah (Houthis), Yemen's Iran-aligned movement, entered the February 2026 U.S.-Israeli war on Iran on March 28, declared a naval blockade on Saudi Arabia in July, seized Bab el-Mandeb coastline, and struck Riyadh airport and Aramco headquarters in October 2026.
Houtman
Houtman is a marine ecoregion of Western Australia's mid-west coast, covering the waters around the Houtman Abrolhos Islands, which hold the Indian Ocean's highest-latitude coral reefs.
Houtman Abrolhos
The Houtman Abrolhos is an archipelago of 210 coral-reefed islands 60 to 80 kilometers off the mid-west coast of Western Australia, named by Frederick de Houtman in 1619.
Houtribdijk
The Houtribdijk, also called the Markerwaarddijk, is a 26 km dam in the Netherlands between Enkhuizen and Lelystad that separates the IJsselmeer from the Markermeer and carries the N307 road.
Houttuynia cordata
Houttuynia cordata (chameleon plant, fish mint, yu xing cao) is an Asian Saururaceae herb eaten as a vegetable, used in traditional Chinese medicine, studied for anti-inflammatory and antiviral effects, and invasive outside its native range.
Houzeau (lunar crater)
Houzeau is a 76.84-km-diameter lunar impact crater at 17.25°S, 123.89°W, mostly within Orientale's outer ejecta, near the Crisium antipode, named for Belgian astronomer Jean-Charles Houzeau.
Houziyan hydroelectric plant
Houziyan hydroelectric plant (猴子岩水电站) is a 1,700 MW hydropower station on the Dadu River in Kangding, Sichuan, China, with its first unit generating from January 2017.
Hove
Hove, the western half of Brighton and Hove on England's south coast, is a Victorian seaside new town known for Regency Brunswick Town, Hove Museum, Hove station, and the King Alfred seafront redevelopment.
Hover fly
The hover fly, also called a flower fly or syrphid fly, is a fly of the family Syrphidae that hovers in mid-air and mimics bees and wasps without stinging.
Hover Lab
Hover Lab, known in Korean as Garosero (가로세로연구소), is a South Korean YouTube channel founded in 2018 that publishes political commentary and celebrity exposés.
Hoverboard
A hoverboard, formally a self-balancing scooter, is a two-wheeled electric vehicle controlled by shifting body weight. Despite the name, it rolls on wheels and does not hover.
Hovercraft
A hovercraft, formally an air cushion vehicle, is an amphibious craft that rides above water, ice, mud, and sand on a cushion of pressurized air held by a flexible skirt.
Hoverflies and humans
Hoverflies and humans describes how hoverfly adults pollinate over 70% of food crops while their larvae eat aphids, and how their bee mimicry causes needless killing.
Hoverflies of New Zealand
Hoverflies of New Zealand: the Syrphidae (ngaro paira) fauna, about 91 species across 16 genera, mixing endemics like Melangyna novaezelandiae and Melanostoma fasciatum with introduced Eristalis tenax and Merodon equestris; adults pollinate crops, larvae eat aphids.
Hoverflies of the Americas
Hoverflies of the Americas covers the hoverfly (flower fly) fauna of North and South America, with about 828 species north of Mexico and roughly 1,800 described Neotropical species.
Hoverfly larva
A hoverfly larva is the legless maggot stage of a hoverfly, feeding on aphids, decaying matter, plants, or ant nests, and valued in biological pest control.
Hoverfly mimicry and ecology
Hoverfly mimicry and ecology describes how the fly family Syrphidae mimics stinging bees and wasps through Batesian mimicry, and its members' roles as pollinators of crops and wildflowers.
Hoverfly morphology and identification
Hoverfly morphology and identification covers the anatomical characters used to identify hoverflies (Syrphidae), led by the spurious wing vein unique to the family, plus eye separation, wing venation, and the fused larval breathing tube.
Hoverfly regional checklists
Hoverfly regional checklists are curated, published inventories of the Syrphidae (hoverflies or flower flies) found in a defined country, island group, or province, with species-level nomenclature and vouchered records behind each entry.
Hoverfly taxonomy and systematics
Hoverfly taxonomy and systematics covers classification of Syrphidae, over 6,300 species in 200+ genera, four subfamilies (Microdontinae, Eristalinae, Syrphinae, Pipizinae), 16 tribes, and molecular phylogenies reshaping the family tree.
Hovering autonomous underwater vehicle
A hovering autonomous underwater vehicle (HAUV) is an underwater robot that uses thrusters to hold a fixed position, used for ship hull inspection and harbor security.
Hoverla
Hoverla (Говерла) is Ukraine's highest mountain, 2,061 m, in the Chornohora range of the Ukrainian Carpathians on the Ivano-Frankivsk–Zakarpattia border; a flysch dome with glacial cirques, the Prut River spring, and a popular 1880-established hiking route.
Hovgaard Island
Hovgaard Island (Krogmann Island) is a 3-nautical-mile-long island in the Wilhelm Archipelago, Penola Strait, Antarctica, 1.5 nmi southwest of Booth Island; discovered by Dallmann 1873-74, renamed by Gerlache's Belgian expedition after Danish naval officer Andreas Hovgaard.
Hovgaard Ø
Hovgaard Ø (Hovgaard Island), uninhabited 1,700 km² Greenland island in the Northeast Greenland National Park between Nioghalvfjerdsfjorden and Dijmphna Sund, named for polar explorer Andreas Peter Hovgaard; distinct from the Antarctic Hovgaard Island.
Hovhannes Draskhanakerttsi
Hovhannes Draskhanakerttsi (Հովհաննես Դրասխանակերտցի) was Catholicos of the Armenian Apostolic Church from 898 until about 928, and the historian whose History of Armenia is the principal source for the end of Arab rule.
Hovhannes Erznkatsi
Hovhannes Erznkatsi Pluz (c. 1230–1293) was an Armenian vardapet, theologian, philosopher, grammarian, and poet of thirteenth-century Greater Armenia and Cilicia; more than 100 of his works survive.