Cosmic thought experiments
What If?
Six possible futures, examined carefully. Each scenario separates confirmed science, plausible inference and speculation. These are thought experiments, not news reports or predictions.
Choose a question
Alien Life
What If We Discovered Intelligent Alien Life Tomorrow?
Follow a hypothetical alien-signal discovery from independent verification to the decision to reply, separating scientific evidence from imagined reactions.
Kardashev Scale
What If Earth Became a Type I Civilization?
Imagine planetary-scale energy use without assuming utopia. Explore infrastructure, waste heat, unequal access and the limits of the Kardashev label.
Mars Colonization
What If Humans Lived Permanently on Mars?
Explore a continuously occupied Mars settlement: maintenance, resupply, health and governance, without confusing a permanent outpost with independence.
Technosignatures
What If We Detected a Dyson Sphere?
An infrared anomaly is not an alien megastructure. Follow the evidence needed to distinguish a Dyson-sphere candidate from natural explanations.
Interstellar Travel
What If Humans Could Travel at 10% the Speed of Light?
Calculate an idealized trip to a nearby star at 0.1c, then examine acceleration, braking, communication delays and the difference between probes and crews.
Civilization Infrastructure
What If Earth Lost Contact With All Satellites?
Explore a hypothetical global satellite-link outage: navigation, communications, recovery and infrastructure resilience without assuming everything stops.