What If the Moon Disappeared Overnight?
• 5 min read
Tides shrink to a third, nights go properly dark, and Earth starts wobbling like a drunk compass. Here's what we lose.
Earth
What If Everyone on Earth Jumped at the Same Time?
• 3 min read
Eight billion people, one coordinated leap. Would the planet notice? The answer involves more crowd crush than cosmic physics.
What If Gravity Suddenly Reversed?
• 3 min read
Everything not bolted down launches skyward. The oceans lift off the seabed. And that's just the first second.