Cards starting with O

987 cards. Page 16 of 17.

  1. Our Flag Means Death turned a hopeless real pirate into a cult romanceStede Bonnet was a real Barbados landowner who abandoned his comfortable life to go pirating, with no talent for it whatsoever. David Jenkins's comedy set him in 1717, paired him …
  2. Our galactic neighbourhood is a dumbbell whose two ends are falling togetherThe Milky Way belongs to a family of galaxies shaped like a dumbbell. We and our satellites form one lobe; the Andromeda Galaxy and its companions form the other, roughly three mi…
  3. Our galaxy is a cosmic traffic jam of stars and dustThe Milky Way looks like a faint, milky band across our night sky, but that view is just an edge-on glimpse of a massive spiral system. We live halfway out from the center in a co…
  4. Our galaxy is on a direct collision course with the Andromeda galaxy.The Andromeda galaxy, a massive spiral containing a trillion stars, is hurtling toward the Milky Way. This video examines the inevitable future of our galactic neighborhood and wh…
  5. Our galaxy is overdue a supernova we can see with the naked eyeOn average a star in the Milky Way should explode every 61 years or so, yet the last one anyone actually saw here was Kepler's in 1604. Dust in the galactic disc may hide some; on…
  6. Our galaxy's central bar may be a phase that comes and goesThe Milky Way has a bar of stars across its middle, like about two thirds of nearby spiral galaxies. Such bars appear to be temporary. Simulations suggest they grow, buckle under …
  7. Our galaxy's name is a literal translation of a celestial roadThe English name for our galaxy is a linguistic journey through history. This video explores how the term evolved from ancient Greek descriptions into the Latin and English words …
  8. Our global food supply relies on just twelve plant species for most calories.Modern agriculture is dangerously narrow, with half of our total calorie intake coming from only three grasses. This video explores the vital role of crop wild relatives in securi…
  9. Our home in the cosmos is not a permanent structure but a fleeting cosmic basin.Laniakea, the massive structure containing our Milky Way, was defined in 2014 by mapping the flow of galaxies. While it spans 400 million light-years and holds 100,000 galaxies, a…
  10. Our home in the galaxy is far more significant than astronomers once assumed.We live inside the Orion Arm, a structure long dismissed as a minor galactic spur. Recent data suggests this region is actually a substantial feature of the Milky Way, rivaling ma…
  11. Our invisible infrastructure is creating a visible crisis in orbitWe rely on a constant stream of satellite data for our modern lives, but this convenience comes with a growing environmental cost. Natalie Panek explores why we must change our be…
  12. Our Milky Way is a cosmic crime scene revealing its own violent, ancient historyGalactic astronomy has transformed from static mapping into a dynamic field of archeology. By analyzing tidally shredded dwarf galaxies and stellar streams, researchers are recons…
  13. Our Moon was born from a violent, planet-sized collision billions of years ago.Earth’s Moon is not a captured wanderer or a twin formed in tandem. Instead, it is a product of destruction. Roughly 4.5 billion years ago, a massive impact between Earth and a Ma…
  14. Our nearest stellar neighbour will keep shining for another four trillion yearsProxima Centauri, the closest star after the Sun at 4.25 light-years, is too dim to see without a telescope. Yet this small red dwarf will outlast the Sun by an enormous margin, s…
  15. Our orbital highways are becoming a junkyard, threatening the future of space exploration.Since the 1957 launch of Sputnik, humanity has filled Earth's orbit with vital satellites. Today, these assets face a growing threat from cascading debris collisions. With mega-co…
  16. Our primate family tree actually has its roots in North AmericaEarly primates once thrived in North America, but they eventually disappeared from the continent. This video explores the history of these early relatives and investigates why the…
  17. Our separation from the natural world is a modern inventionFilmmaker Damon Gameau explores how humanity's perception of itself as superior to nature has fueled industrial progress while simultaneously pushing the planet toward an ecologic…
  18. Our solar system began as a giant ball of gasBefore the eight planets and hundreds of moons existed, our cosmic backyard was nothing more than an explosive cloud of gas and dust. Understanding how this massive nebula transfo…
  19. Our solar system is currently drifting through a massive, empty cosmic crime scene.For millions of years, our sun has been traveling through the Local Bubble, a vast, low-density cavity in space. This region was carved out by a violent series of supernovas. We o…
  20. Our Solar System is currently drifting through a mysterious, magnetized cloud of interstellar gas.We are sailing through the Local Interstellar Cloud, a 30-light-year-wide region of space that our Sun entered roughly 10,000 years ago. While it sounds dense, this cloud is actua…
  21. Our solar system is much more than just eight planetsWhile we often focus on the familiar planets, our cosmic neighborhood is teeming with hidden complexity. From wandering dwarf planets to millions of asteroids, the scale and varie…
  22. Our solar system may hide life beneath layers of iceWe are entering a new era of space exploration focused on 'ocean worlds.' This video investigates why moons orbiting Jupiter and Saturn are primary targets in the search for extra…
  23. Our species is at least 300,000 years old, far older than once thoughtFor decades the Omo skulls from Ethiopia, about 195,000 years old, marked the dawn of anatomically modern humans. Then finds from Jebel Irhoud in Morocco pushed the date back to r…
  24. Our Sun might be an outlier in the galaxyThe search for Earth 2.0 has faced a surprising hurdle: our own star might not be the standard model. This video explores how assumptions about the Sun's typicality shaped the Kep…
  25. Our Sun probably had thousands of sibling stars it has since lostAbout 4.6 billion years ago a fragment of a giant gas cloud collapsed, perhaps nudged by an exploding star. The Sun likely grew up in a crowded cluster of between one thousand and…
  26. Our tidy arrangement of planets looks unusual among thousands of known systemsSmall rocky worlds close to the Sun, giant planets farther out: it feels like the natural order. Yet among 4,809 planetary systems confirmed by April 2026, few resemble ours. More…
  27. Our universe might be sitting in a metastable state waiting to spontaneously collapse.In quantum field theory, a false vacuum is a state that is locally stable but not at the lowest possible energy. If our universe is currently in such a state, it could theoretical…
  28. Out at sea, a tsunami is a swell only about 30 centimetres highA tsunami can cross an ocean almost unnoticed, raising the surface by roughly 300 millimetres, because its wavelength stretches hundreds of kilometres. Only in shallow coastal wat…
  29. Outer hair cells amplify sound waves more than fortyfoldHearing is not a passive microphone. After the outer ear and middle-ear bones raise pressure, cochlear outer hair cells lengthen and shorten, boosting traveling-wave amplitudes ov…
  30. Output devices bridge the gap between digital data and human perceptionAn output device translates computer data into a form humans can perceive, such as text, audio, or video. From the pixels on your smartphone screen to the sound vibrating from you…
  31. Outside Asia, no mountain tops Argentina’s AconcaguaAconcagua rises 6,967.15 metres in Argentina's Mendoza Province, higher than any mountain outside Asia and the second most prominent peak on Earth. Once an active stratovolcano ab…
  32. Outside brain and cord, nerves and ganglia still run the bodyThe peripheral nervous system is everything neural beyond brain and spinal cord—nerves and ganglia linking center to edge in bilateral animals. It splits into somatic and autonomi…
  33. Outsider art began as a French label for work beyond cultureRoger Cardinal coined "outsider art" in 1972 for Jean Dubuffet's art brut—raw work by psychiatric patients, hermits, and spiritualists outside official culture. Adolf Wölfli's ill…
  34. Outsourcing your investment strategy: what are managed solutions and do you need them?For investors who prefer to delegate the complexities of portfolio management, various professional services exist. This video explores the landscape of managed solutions, specifi…
  35. Ovarian cancer risk tracks how many times a woman has ovulatedEvery ovulation prompts cells in and around the ovary to divide, and each round of division is a small chance for something to go wrong. That is why ovarian cancer risk rises with…
  36. Ovaries are gonads that release eggs and rewrite hormonesIn humans each ovary is a gonad: it ripens and releases egg cells while secreting sex hormones and inhibin that brakes pituitary FSH. Paired glands flank the uterus, linked by fal…
  37. Over 100 million people across 43 countries still follow Africa's traditional religionsAfrica's indigenous faiths have no single scripture. They live in songs, myths, festivals and the memory of ancestors, who are believed to bless or trouble the living. Even where …
  38. Over 13 Million People Were Forced Into Labor for the Nazi War MachineThis documentary examines the systematic exploitation of millions across Europe during the Third Reich. Through survivor testimonies and historical analysis, it reveals the scale …
  39. Over 2,000 known or suspected terrorists have been removed from the United States since 2025.Between January 2025 and September 2026, U.S. Immigration and Customs Enforcement intensified efforts to locate and deport individuals identified as known or suspected terrorists.…
  40. Over 25,000 islands sit between two great oceansThe Malay Archipelago—also Insulindia or the Indo-Australian Archipelago—spans the waters between Mainland Southeast Asia and Australia. With more than 25,000 islands it is the wo…
  41. Over a third of India's benchmark stock index is banks and financeThe NIFTY 50 tracks fifty of the biggest companies on India's National Stock Exchange, yet one sector dominates it. As of August 2026, financial services carried 36.47% of the wei…
  42. Over a third of Japan's population lives in the Kantō regionThe Kantō region on Honshu holds Tokyo and six surrounding prefectures, and the October 2025 census counted 43,509,179 people there, more than one in three Japanese residents. Muc…
  43. Over half of Earth's surface is dark, flat seafloor few people have seenAbyssal plains, lying three to six kilometres down, cover more than half the planet's surface and rank among the flattest places on Earth. Yet scientists only recognised them as d…
  44. Over half of the global population lives in areas prone to climate-related hazardsClimate change is not a uniform threat. While 4.5 billion people—roughly 57 percent of the world—face exposure to floods, droughts, cyclones, or heatwaves, the true danger lies in…
  45. Over one billion people lived with obesity in 2022Obesity is excess body fat that harms health; adults usually meet the label at BMI over 30 kg/m², with 25–30 called overweight. In 2022 more than one billion people were obese—879…
  46. Over one Venezuelan lake, lightning flickers for up to nine hours a night.Where the Catatumbo River meets Lake Maracaibo, storms gather on 140 to 160 nights a year, flashing up to 40 times a minute for about nine hours at a stretch. It is the most light…
  47. Over six hundred muscles, about forty percent of youThe muscular system combines skeletal, cardiac and smooth muscle to move the body, hold it upright, pump blood and keep it warm. An adult has more than 600 skeletal muscles, the e…
  48. Overcoming a heart murmur to reach the final shuttle flightRex Walheim shares his journey to becoming a shuttle veteran, revealing how he navigated a physical hurdle to reach the final mission of the Space Shuttle program.
  49. Overcoming Soil Challenges for Successful Potato and Shallot HarvestsGardening Australia explores practical strategies for cultivating long-season crops like potatoes and shallots. Learn how to adapt your planting techniques to manage specific soil…
  50. Overcoming systemic barriers to reach the starsExplore the legacy of African American pioneers who broke barriers in flight and space exploration. This overview highlights the resilience required to achieve these milestones de…
  51. Overcoming the mental barrier of high-speed breakdancing power movesMastering the swipe in breakdancing is as much a psychological feat as a physical one. While it appears to be a seamless display of momentum, the move is fundamentally rooted in o…
  52. Overfished Devon waters gave birth to the modern deep-sea trawlerBy the early 1800s, fishermen at Brixham in Devon had emptied their local grounds and needed to sail farther than ever. The fast, sturdy boat they developed could tow big nets in …
  53. Overfishing threatens over one-third of all shark and ray species with extinctionA global reassessment of 1,199 shark, ray, and chimera species found that 32.6% are now threatened with extinction. Researchers observed that overfishing is a universal threat to …
  54. Overparametrized models can achieve lower error through a double descent phenomenonResearchers studying random features regression found that model complexity does not always follow a simple U-shaped error curve. Instead, they observed a 'double descent' where e…
  55. Overseas France: A Global Republic Spanning Oceans and ContinentsOverseas France is not a single administrative entity, but a diverse collection of thirteen territories scattered across the Atlantic, Pacific, and Indian Oceans. From the jungles…
  56. Ovid’s Fasti: A poetic calendar that survived exile and centuries of scholarly debateOvid’s Fasti is a six-book Roman poem that functions as a calendar, blending mythology, astronomy, and ritual. Written while the poet was in exile, it has been dismissed as an art…
  57. Ovonramwen: The Last Independent King of Benin Before the British ConquestAs the thirty-fifth Oba of Benin, Ovonramwen navigated a crumbling empire under immense colonial pressure. His reign, defined by internal purges and a desperate struggle to mainta…
  58. Owain Glyndŵr led a Welsh uprising that nearly dismantled English control for fifteen years.Between 1400 and 1415, Owain Glyndŵr launched a revolutionary rebellion against the English crown. At its peak, he controlled most of Wales, established a parliament, and sought t…
  59. Owen Jones wrote thirty-seven rules for decorating interiorsInterior design grew from instinctive building into a managed profession once industrial cities and complex architecture demanded planned space. Architect Owen Jones, decorating J…
  60. Owerri: The Nigerian Heartland City Known as the Las Vegas of AfricaDeep in the heart of Igboland lies Owerri, a vibrant Nigerian capital defined by its bustling nightlife, rich agricultural landscape, and a culinary masterpiece known as the king …