[
  {
    "fact": "The Great Wall of China is over 13,000 miles long.",
    "source": "https://www.history.com/topics/great-wall-of-china",
    "category": "History",
    "reference_url": "https://www.history.com/topics/great-wall-of-china"
  },
  {
    "fact": "The human brain is made up of over 100 billion nerve cells.",
    "source": "https://www.britannica.com/science/human-brain",
    "category": "Science",
    "reference_url": "https://www.britannica.com/science/human-brain"
  },
  {
    "fact": "The Sahara Desert is the largest hot desert in the world.",
    "source": "https://www.worldatlas.com/articles/largest-deserts-in-the-world-by-area.html",
    "category": "Geography",
    "reference_url": "https://www.worldatlas.com/articles/largest-deserts-in-the-world-by-area.html"
  },
  {
    "fact": "Bees communicate with each other by dancing.",
    "source": "https://www.nationalgeographic.com/animals/invertebrates/honeybee/",
    "category": "Biology",
    "reference_url": "https://www.nationalgeographic.com/animals/invertebrates/honeybee/"
  },
  {
    "fact": "The average person spends 26 years of their life sleeping.",
    "source": "https://www.sleephealth.org/sleep-health/why-sleep-is-important/",
    "category": "Health",
    "reference_url": "https://www.sleephealth.org/sleep-health/why-sleep-is-important/"
  },
  {
    "fact": "Mount Everest is the highest mountain in the world at 29,032 feet.",
    "source": "https://www.britannica.com/place/Mount-Everest",
    "category": "Geography",
    "reference_url": "https://www.britannica.com/place/Mount-Everest"
  },
  {
    "fact": "The Mona Lisa painting by Leonardo da Vinci is worth over $800 million.",
    "source": "https://www.telegraph.co.uk/art/mona-lisa-six-things-might-know-leonardos-masterpiece/",
    "category": "Art",
    "reference_url": "https://www.telegraph.co.uk/art/mona-lisa-six-things-might-know-leonardos-masterpiece/"
  },
  {
    "fact": "Lightning can reach temperatures of 30,000 kelvins.",
    "source": "https://www.livescience.com/60863-what-is-lightning.html",
    "category": "Weather",
    "reference_url": "https://www.livescience.com/60863-what-is-lightning.html"
  },
  {
    "fact": "The internet weighs about as much as a strawberry.",
    "source": "https://www.npr.org/sections/alltechconsidered/2016/08/02/488368345/how-much-does-the-internet-weigh",
    "category": "Technology",
    "reference_url": "https://www.npr.org/sections/alltechconsidered/2016/08/02/488368345/how-much-does-the-internet-weigh"
  },
  {
    "fact": "The largest recorded snowflake was 15 inches wide and 8 inches thick.",
    "source": "https://www.nationalgeographic.com/science/phenomena/2013/01/24/the-science-of-snowflakes-and-why-no-two-are-alike/",
    "category": "Weather",
    "reference_url": "https://www.nationalgeographic.com/science/phenomena/2013/01/24/the-science-of-snowflakes-and-why-no-two-are-alike/"
  }
]