fn main() {
    let c = phoboss::geology::craters::primary_crater();
    println!(
        "{}: {} km, d/D = {:.4}",
        c.name,
        c.diameter_km,
        c.depth_to_diameter_ratio()
    );
    let impactor = phoboss::physics::collisions::basin_forming_impactor();
    println!("Basin-forming KE: {:.2e} J", impactor.kinetic_energy_j());
    println!(
        "Transient crater: {:.0} m",
        impactor.transient_crater_diameter_m()
    );
}
