Tools

Asteroid Impact Simulator

Spin the planet, drop an asteroid anywhere on Earth, and see the fireball, crater, blast radius and estimated casualties — every number computed from the published impact-effects equations.

Launch the simulator →

Cosmic Threat Calculator

Rank the universe's doomsday scenarios by how likely they are to end life on Earth — from supervolcanoes to gamma-ray bursts and vacuum decay.

Open the calculator →

Nuclear Blast Radius Map

Choose a weapon, drop it on any city on Earth, and see how far the fireball, blast wave, heat and radiation actually reach — every figure computed from the published weapons-effects tables, and every equation shown to you.

Open the blast map →