10 What If Scenarios About Our Solar System
10 Mars Never Lost Its Magnetic Field Mars once had a promising atmosphere that was warm, wet, and dominated by carbon dioxide, which was destroyed when the red planet lost its magnetic field around 3.6 billion years ago, allowing the Sun’s punishing solar winds to strip away the atmosphere. This happened relatively quickly in cosmic terms, with most of the atmosphere lost within a few hundred million years of the magnetic field shutting down....