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Questions and answers
- Yemeni Civil War (2014–present)
- Yemenite architecture: forms, materials, history, and regional styles Yemenite architecture
- Yentl (1983) — Barbra Streisand musical drama Yentl
- Yeongam County, South Jeolla Province Yeongam
- Yerba mate (Ilex paraguariensis): plant, uses, and cultural role Yerba mate
- Yerevan — Capital and largest city of Armenia Yerevan
- Yes (English affirmative) Yes
- Yes, Dear (American sitcom) Yes, Dear
- Yeshe Tsogyal: Life, Role, and Legacy in Tibetan Buddhism Yeshe Tsogyal
- Yèvre — river of the Cher department, Centre-Val de Loire, France Yèvre
- YHWH: the Tetragrammaton and the Holy Name in Judaism and Christianity YHWH
- Yi (dinosaur) — a small Jurassic climber with membranous gliding wings Yi (dinosaur)
- Yi Sun-sin
- Yield (finance) Yield
- Yield to the Night
- Yio Chu Kang MRT station (NS15) — overview, history and features Yio Chu Kang MRT station
- Yip Man (Ip Man) — Wing Chun master and influential teacher Yip Man
- Yishun MRT station (NS13) — overview, layout, history and significance Yishun MRT station
- YM (magazine)
- Yo no creo en los hombres (Mexican telenovela) Yo no creo en los hombres
- Yo-yo: history, mechanics, tricks and modern practice Yo-yo
- Yo‑yo effect (weight cycling) Yo-yo effect
- Yoani Sánchez (Cuban blogger and journalist) Yoani Sanchez
- Yoenis Céspedes — Cuban professional baseball outfielder Yoenis Céspedes
- Yoga: Origins, Practices, Styles, Health Effects and Cultural Context Yoga
- Yogi: practitioner of Yoga and contemplative disciplines Yogi
- Yogurt: fermented milk product — production, varieties, nutrition and uses Yogurt
- Yogyakarta Principles on Sexual Orientation and Gender Identity Yogyakarta Principles
- Yoko Kanno — Japanese composer and keyboardist Yoko Kanno
- Yoko Ono — Japanese multimedia artist, musician and peace activist Yoko Ono
- Yolanda Saldívar: conviction in the killing of singer Selena Yolanda Saldívar
- Yom Kippur War (October 1973) Yom Kippur War
- Yomi — the Japanese underworld in Shinto myth Yomi
- Yonaguni Monument (submerged rock formation) Yonaguni monument
- Yonge Street — Toronto’s principal thoroughfare and historic axis Yonge Street
- Yongle Emperor (Zhu Di) — Ming dynasty ruler, builder and maritime patron Yongle Emperor
- Yonne: geography, history, culture and notable places in central France Yonne
- Yonne (river)
- Yonsei (fourth-generation Japanese diaspora) Yonsei (fourth-generation Nikkei)
- Yonsei University
- Yorba Linda, California
- Yordano Ventura — Dominican Major League Baseball pitcher (1991–2017) Yordano Ventura
- York: historic walled city in North Yorkshire, England York
- York Cottage — Royal residence on the Sandringham Estate York Cottage
- York Minster
- Yorkshire Coast Radio
- Yorkshire Dales — upland valleys and national park in northern England Yorkshire Dales
- Yosemite Decimal System (YDS) Yosemite Decimal System
- Yosemite Falls — tallest waterfall in the United States Yosemite Falls
- Yosemite National Park — California granite valley, waterfalls, and wilderness Yosemite National Park
- Yoshi — the dinosaur companion from Nintendo's Mario series Yoshi
- Yoshi Tatsu (Naofumi Yamamoto) — Japanese wrestler and former boxer Yoshi Tatsu
- Yoshinori Ohsumi — Autophagy Researcher and Nobel Laureate Yoshinori Ohsumi
- Yothu Yindi: Australian Indigenous Band, Music and Cultural Impact Yothu Yindi
- Yotta: the SI prefix for 10^24 Yotta-
- You Can't Run Away from It (1956 film) You Can't Run Away from It
- You Gotta Be (Des'ree song) You Gotta Be
- You Keep Me Hangin' On — song history, versions, and legacy You Keep Me Hangin' On
- You Make It Feel Like Christmas — Gwen Stefani (2017 album) You Make It Feel Like Christmas
- You Make Me Wanna... — Usher song (1997) You Make Me Wanna...
- You Need to Calm Down (Taylor Swift song) You Need to Calm Down
- You Want It You Got It (Bryan Adams album) You Want It You Got It
- You're Cut Off! (VH1 reality series) You're Cut Off!
- You're My Heart, You're My Soul
- Youm7 — Egyptian daily newspaper and digital news brand Youm7
- Young Adult Library Services Association (YALSA) Young Adult Library Services Association
- Young Artist Award — recognition for performers under 21 Young Artist Award
- Young Cassidy (1965 film) Young Cassidy
- Young Earth creationism: beliefs, history, and public controversies Young Earth creationism
- Young Frankenstein (1974 film) Young Frankenstein
- Young Hercules — 1998 Fox Kids adventure series starring Ryan Gosling Young Hercules
- Young Plan (1929): Revision of German World War I Reparations Young Plan
- Young Sheldon (TV series) Young Sheldon
- Young Sherlock Holmes (1985 film) Young Sherlock Holmes
- Young–Laplace equation
- Young, New South Wales
- Young's double-slit experiment: wave–particle duality and quantum interference Young's double-slit experiment
- Youngstown, Ohio — overview, history, economy, and contemporary profile Youngstown, Ohio
- Younha — South Korean singer-songwriter and pianist Younha
- Your Name (Kimi no Na wa.) — 2016 Japanese animated film Your Name
- Your Name (album) — soundtrack by Radwimps Your Name (album)
- Yours Truly (Ariana Grande album) It was released in September, 2013
- Yousaf Raza Gillani: Pakistani politician and prime minister (2008–2012) Yousaf Raza Gillani
- Youth: definitions, development, cultural meaning and social roles Youth
- YouTube: overview, history, features, creators, and impact YouTube
- Tu Youyou Youyou Tu
- Ystradgynlais: town in Powys, Wales Ystradgynlais
- Yu-Gi-Oh! (1998 anime)
- Yuan dynasty: Mongol rule over China (1271–1368) Yuan dynasty
- Wang Yue (Chinese chess grandmaster) Yue Wang
- Yuendumu: Remote Aboriginal Community in Central Australia Yuendumu
- Yuga (Hindu ages): cyclical eras of virtue and decline Yuga
- Yugoslavia: history, federation, and dissolution Yugoslavia
- Yugoslavia at the Olympics: participation, teams, and legacy Yugoslavia at the Olympics
- Yui Horie — Japanese voice actress and singer Yui Horie
- Yuji Naka — Japanese Programmer, Designer and Creator Associated with Sonic Team Yuji Naka
- Yukultji Napangati: Western Desert painter and Papunya Tula artist Yukultji Napangati
- Yulia Lipnitskaya — Russian figure skater and 2014 Olympic team champion Yulia Lipnitskaya
- Yulia Nachalova: Russian singer, actress and television presenter Yulia Nachalova
- Yulia Tymoshenko — Ukrainian politician and two-time Prime Minister Yulia Tymoshenko
- Yummy (Justin Bieber song)
- Yun Chi-ho (1865–1945): Korean reformer, Christian activist, and controversial figure Yun Chi-ho
- Yuna Kim (Kim Yeon-ah) — South Korean Figure Skater and Olympic Champion Yuna Kim
- Yuri Gagarin — first human in space Yuri Gagarin
- Yuri Lyubimov — Russian theatre director and founder of the Taganka Theatre Yuri Lyubimov
- Yurt: Traditional Portable Dwelling of Central Asian Nomads Yurt
- Yusuf Islam (Cat Stevens) — English singer-songwriter and philanthropist Yusuf Islam
- Yut (Yutnori): Traditional Korean stick-and-token board game Yut
- Yutyrannus — large feathered tyrannosauroid of the Early Cretaceous Yutyrannus
- Yuvan Shankar Raja: Composer, Singer, and Innovator in Tamil Film Music Yuvan Shankar Raja
- Yuya Matsushita — Japanese singer and actor Yuya Matsushita
- Yuzu (Japanese pop duo) Yuzu (band)
- Yves Lambert — French aerospace engineer and former head of Eurocontrol Yves Lambert
- Yves Saint Laurent
- Yvette Fielding: British television presenter and paranormal producer Yvette Fielding
- Z-Cars (British television police drama) Z-Cars
- Zack de la Rocha: musician, activist, and voice of political rock Zack de la Rocha
- Zack Greinke
- Zack Snyder's Justice League (Snyder Cut) Zack Snyder's Justice League
- Zadie Smith: English novelist, essayist and cultural commentator Zadie Smith
- Żagań — historic town in western Poland Żagań
- Zahir Raihan: Bangladeshi Writer, Filmmaker and Cultural Figure Zahir Raihan
- Zakarpattia Oblast (Transcarpathia): geography, history, people and economy Zakarpattia Oblast
- Zakir Husain (1897–1969): Indian educator and third President of India Zakir Husain (politician)
- Zakynthos (Zante): Greek Ionian Island — geography, history, and attractions Zakynthos
- Zakynthos (city) — capital of Zakynthos Island Zakynthos (city)
- Zam Zama (Zam-zammah): the historic cannon of Punjab Zam Zama
- Zambezia Province, Mozambique Zambezia Province
- Zambia: geography, history, culture, and economy Zambia
- Zanzibar: islands, history and culture of the East African archipelago Zanzibar
- ZAPiT Games — Canadian family-focused game developer and console maker ZAPiT Games
- Zapolyarny — town in Pechengsky District, Murmansk Oblast Zapolyarny, Murmansk Oblast
- Zapotec civilisation: Monte Albán and the Valley of Oaxaca Zapotec civilisation
- Zara Tindall: British equestrian, royal family member and Olympic medallist Zara Tindall
- Zarqan — city in Shiraz County, Fars Province, Iran Zarqan
- Zauro polder project: irrigation and floodplain development on the Rima River Zauro polder project
- Zealot (1st-century Jewish movement and modern usage) Zealot
- Zebedee — New Testament figure and father of apostles James and John Zebedee
- Zebra: overview, appearance, species, behavior and conservation Zebra
- Zebra mussel (Dreissena polymorpha): invasive freshwater bivalve Zebra mussel
- Zebulon Pike — American explorer, soldier, and namesake of Pikes Peak Zebulon Pike
- Zedd (Anton Zaslavski) — German-Russian DJ, producer and songwriter Zedd
- Zee Bangla — Bengali-language entertainment channel Zee Bangla
- Zekes — Swedish dansband from Skara Zekes
- Zendaya: American actress, singer, and cultural figure Zendaya
- Zenith (astronomy and everyday usage) Zenith
- Zeno's paradoxes
- Zenwalk Linux
- Zenzenzense (前前前世) — song by Radwimps from Your Name Zenzenzense
- Zermatt: Alpine village and resort beneath the Matterhorn Zermatt
- Zermelo–Fraenkel set theory (ZF) Zermelo–Fraenkel set theory
- Zero Instruction Set Computer (ZISC): associative, pattern‑matching processors Zero instruction set computer
- Zetel (Lower Saxony, Germany) Zetel
- Zeus — chief deity of the ancient Greek pantheon Zeus
- Zhang Jike — Chinese table tennis player and Grand Slam champion Zhang Jike
- Zhang Li Yin (Zhang Liyin) — Chinese singer active in Korea and China Zhang Li Yin
- Zhangzhung: the pre-Tibetan kingdom and its Bon cultural legacy Zhangzhung
- Zhanjiang — port city in Guangdong, China Zhanjiang
- Zhanna Nemtsova — Russian journalist and activist Zhanna Nemtsova
- Zhao Ziyang — Chinese reformer and Communist Party leader Zhao Ziyang
- Zhejiang University (ZJU) Zhejiang University
- Zhejiangopterus
- Zhemgang District
- Zheng He — Ming dynasty admiral and maritime explorer Zheng He
- Zhenyuanlong — a large feathered dromaeosaur from the Early Cretaceous Zhenyuanlong
- Zhong Zhong and Hua Hua — first primates cloned by somatic cell nuclear transfer Zhong Zhong and Hua Hua
- Zhongyuan (Central Plains of China) Zhongyuan
- Zhou dynasty: politics, philosophy, and legacy of early China Zhou dynasty
- Zhu Xi — Leading Song‑dynasty Neo‑Confucian Scholar Zhu Xi
- Zhucheng fossil site: major Late Cretaceous dinosaur bonebed in Shandong, China Zhucheng fossil site
- Zhuge Liang: Shu Han Chancellor, Strategist, and Cultural Icon Zhuge Liang
- Zhuhai: coastal city in Guangdong's Pearl River Delta Zhuhai
- Zhuyin (Bopomofo): Chinese phonetic notation and its uses Zhuyin
- Ziegfeld Follies: The Broadway Revue That Shaped American Spectacle Ziegfeld Follies
- Zieria adenophora (Araluen Zieria) Zieria adenophora
- Zifeng Tower (Nanjing Greenland Financial Center) Zifeng Tower
- Zika fever: causes, symptoms, complications, and prevention Zika fever
- Zika virus (ZIKV): biology, transmission, clinical features, and history Zika virus
- Zimbabwe at the Olympics
- Zina (Islamic law): unlawful sexual relations and their legal treatment Zina
- Zinc (Zn): properties, occurrence, uses, isotopes, and biological role Zinc
- Zinc arsenide (Zn3As2) — properties, preparation, uses, and safety Zinc arsenide
- Zinc finger: structure, natural roles and engineered applications Zinc finger
- Zine El Abidine Ben Ali
- Zip — fastener, file format, postal code, and other uses Zip
- ZIP (file format): archive and compression standard ZIP (file format)
- ZIP code (U.S. postal code system) ZIP code
- Zip drive
- Zip line: aerial cable rides, crossings and recreational ziplines Zip line
- Zipf's law: rank–frequency power law in language and complex systems Zipf's law
- Zircon — silicate mineral, gemstone, and source of zirconium Zircon
- Zodiac Killer: overview of crimes, ciphers, investigation, and legacy Zodiac Killer
- Zoe: name, meanings, and notable uses Zoe
- Zoë Kravitz: actress, singer and model Zoë Kravitz
- Zoey 101 (TV series) Zoey 101
- Zojila (Zoji La) — mountain pass linking Kashmir and Ladakh Zojila La
- Zola (Bonginkosi Dlamini) — South African Kwaito Artist, Actor and Presenter Zola (musician)
- Zollernalbkreis — district in the Swabian Alb, Baden-Württemberg Zollernalbkreis
- Zombie: origins, traits, cultural meanings and modern portrayals Zombie
- Zone of Avoidance
- Zones of Nepal (Anchal): historical administrative divisions Zones of Nepal
- Zoolander 2 (2016 film) Zoolander 2
- Zoonosis: diseases transmitted from animals to people Zoonosis
- Zootaxa: international journal of animal taxonomy and systematics Zootaxa
- Zorn (river, Grand Est, France) Zorn (river)
- Zoroastrianism: Origins, Beliefs, Rituals, and Modern Community Zoroastrianism
- Zorro, The Gay Blade (1981 film) Zorro, The Gay Blade
- Zsanett Jakabfi — Hungarian footballer Zsanett Jakabfi
- Zugzwang: the chess situation where any move worsens your position Zugzwang
- Zuiderzee Works (Dutch coastal engineering and land reclamation project) Zuiderzee Works
- Zulu language (isiZulu): overview, features, history and status Zulu language
- Zulu people: history, language, culture and contemporary life Zulu people
- Zürich S‑Bahn: suburban rail network serving the Zürich metropolitan area Zürich S-Bahn
- Zürich Stock Exchange (SIX Swiss Exchange) Zürich Stock Exchange
- Zvezda-2005 Perm — Russian women's football club Zvezda-2005 Perm
- Zvonko Bušić: Croatian nationalist convicted for the 1976 TWA Flight 355 hijacking Zvonko Bušić
- Zwentendorf Nuclear Power Plant
- Zwettl District
- Zwickau (rural district) — Landkreis Zwickau in Saxony, Germany Zwickau (district)
- Zwickauer Land — former rural district in Saxony, Germany Zwickauer Land Rural District
- Zygote: the fertilized cell that begins a new multicellular organism Zygote
- Zyklon B: hydrogen cyanide fumigant and its historical use Zyklon B