7 Historical Conspiracy Theories
This lesson explores seven intriguing historical conspiracy theories that challenge our understanding of history, including the Phantom Time Hypothesis, the true authorship of Shakespeare’s works, and the circumstances surrounding Lincoln’s assassination. While these theories capture the imagination, the lesson emphasizes the importance of relying on credible evidence and historical research to discern fact from fiction. Ultimately, it highlights the mysteries of history and encourages critical thinking about the narratives we accept.
Why doesn’t glue stick to the inside of the container? – Big Questions – (Ep. 29)
In this lesson, we explored why glue doesn’t stick to the inside of its container, focusing on white craft glue made from water-based polymers like polyvinyl acetate (PVA). The glue remains liquid inside the bottle because it is protected from air and retains moisture; once exposed to air, the water evaporates, allowing the glue to dry and adhere to surfaces. Additionally, we briefly discussed super glue, which requires a small amount of water to activate and remains liquid inside its container until it encounters moisture.
How far can I see on a clear day? – Big Questions (Ep. 18)
The lesson explores how far one can see on a clear day, highlighting that visibility is influenced by factors such as height, atmospheric conditions, and the curvature of the Earth. It discusses the limitations imposed by the horizon and introduces concepts like atmospheric refraction, which affects light travel. Additionally, it mentions a formula developed by Dr. Andrew T. Young for calculating visibility distance, emphasizing that various elements can impact the accuracy of such calculations.
24 Scientific Studies about Food Show Ep. 503
In this lesson, John Green explores various fascinating studies related to food, highlighting how factors like expectation, self-control, and even sleep can influence our eating habits and preferences. From the surprising effects of visuals on food choices to the impact of portion control and the role of probiotics on brain activity, the lesson reveals the intricate connections between food, behavior, and health. Ultimately, it emphasizes the importance of understanding our food choices and their implications for well-being.
20 Random Facts You Need To Know
This lesson presents 20 random and fascinating facts that highlight quirky historical anecdotes, unusual animal behaviors, and surprising connections in culture and science. From the peculiar term “posiwala” for jam lovers to the unexpected use of Monopoly games during WWII, these facts encourage curiosity and exploration of the world around us. Each fact serves as a reminder of the intriguing and often humorous aspects of history and nature.
Misconceptions about Cancer (Ep. 39)
In this lesson, Ellie addresses common misconceptions about cancer, emphasizing that cancer is not a uniform disease but encompasses various types with distinct behaviors and treatment responses. She clarifies that survival rates have significantly improved, dispels myths about artificial sweeteners and deodorants causing cancer, and highlights that both men and non-smokers can be affected by breast and lung cancer, respectively. Additionally, she reassures that physical injuries do not lead to cancer and that surgery does not typically cause cancer to spread.
28 Facts about the History of Makeup Show Ep. 505
This lesson explores the captivating history of makeup, tracing its origins from ancient civilizations to modern times. It highlights key developments, such as the use of toxic substances in early cosmetics, the invention of solid lipstick in the 11th century, and the establishment of safety regulations in the 20th century. The lesson emphasizes the cultural significance of makeup throughout history, showcasing its evolution and the impact of notable figures and innovations in the cosmetics industry.
10 Lost Languages of the United States
The lesson highlights the alarming rate at which languages, particularly indigenous ones, are disappearing, with UNESCO estimating that around 3,000 languages could vanish by the end of the century. It discusses the distinction between dead, extinct, and dormant languages, emphasizing the historical factors contributing to language loss, such as forced assimilation. The lesson also showcases specific languages from the United States that have disappeared or are at risk, while underscoring the importance of preservation efforts to maintain cultural identity and diversity.
41 Facts about Vegetables Show Ep. 425
In this lesson, John Green shares 41 fun and intriguing facts about vegetables, highlighting their nutritional value, cultural significance, and unique characteristics. He explains that the term “vegetable” is more cultural than scientific, discusses the best ways to preserve their nutrients, and shares entertaining anecdotes and trivia, such as the peculiar history of vegetables in school lunches and the quirky world records associated with them. Overall, the lesson aims to celebrate the diversity and importance of vegetables in our diets and culture.
107 Regional Slang Words (Ep. 25)
In this lesson, John Green explores the fascinating world of regional slang, highlighting how different terms for common items vary across locations. From fizzy drinks called “pop” in the Midwest to “soda” in the Northeast, and the various names for sandwiches like “hoagie” and “grinder,” the lesson showcases the rich diversity of language and its evolution. The discussion also includes unique terms for everyday objects and concepts, emphasizing the playful and quirky nature of regional dialects.