“The magnetic field is vital to our continued existence. It helps keep the atmosphere we breathe in”

I knew about reducing how much cosmic radiation we receive, but not about protecting the atmosphere:

“Many scientists have argued that the magnetic field is crucial for protecting the atmosphere from erosion by energetic particles coming from the Sun.” https://science.nasa.gov/earth/earth-oxygen-magnetic-field-linked/

Also, “the planetary magnetic field has followed similar rising and falling patterns as oxygen in the atmosphere for nearly a half billion years, dating back to the Cambrian explosion, when complex life on Earth emerged.”