Mars was once like Earth

"Mars once had a global magnetic field, generated deep inside the planet, strong enough to deflect the solar wind much as Earth’s does today."https://spacedaily.com/t-mars-once-had-a-magnetic-field-strong-enough-to-deflect-solar-wind-just-as-earths-does-now-when-it-collapsed-the-planet-lost-its-atmosphere-and-its-oceans-within-a-geologically-brief-peri/