Magnetic Field Lines - Definition, Properties, How to Draw - Teachoo

Video: Earth’s magnetic field changes over time. Earth is surrounded by a constantly changing magnetic field that shields our habitat against harmful radiation from cosmic rays and the solar wind. A new study in AGU’s journal Reviews of Geophysics summarizes what scientists currently know about how Earth’s magnetic field has evolved over the past 100,000 years. This animation shows how the intensity of Earth’s magnetic field changed from 44,000 to 38,000 years ago. Around 41,000 years ago, a geo