The moon had a magnetic field that helped protect Earth’s atmosphere

Some 4 billion years ago, the moon may have had a magnetic field that combined with Earth’s to create a powerful magnetic shield that protected our planet’s atmosphere

Source:
https://www.newscientist.com/article/2257286-the-moon-had-a-magnetic-field-that-helped-protect-earths-atmosphere/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home