Explore Capsules

Screen-weary eyes have made blue light glasses a booming product, but the evidence behind them is shakier than the marketing suggests. The views here split over whether relief really comes from treating dry eyes, fixing your desk setup, and changing screen habits before bed rather than from tinted lenses. Sort out which fixes are backed by evidence before you spend on the wrong one.

Rhetorical devices are powerful techniques that enhance how we express ideas and influence audiences. This collection presents a wide range of methods—from building credibility and appealing to emotions to using repetition, contrast, and figurative language—that help speakers and writers craft compelling arguments and memorable messages. Learn how to apply these tools effectively to engage listeners, clarify points, and enrich your communication.

The claim that the Great Wall is visible from orbit survives in textbooks and trivia nights despite astronauts saying otherwise. The arguments here approach the myth from different angles: the physics of human eyesight, firsthand astronaut testimony, the role of cameras and optical aids, and why comfortable falsehoods outlive clear corrections. It becomes a lesson in how to test what everyone knows.