2019-12-17, 07:28
Greenland Rocks Suggest Earth's Magnetic Field Is Older Than We Thought
Analysis finds that the planet’s protective shield was in place by at least 3.7 billion years ago, as early life arose
-- Read more on ScientificAmerican.com
https://www.scientificamerican.com/artic...e-thought/
Analysis finds that the planet’s protective shield was in place by at least 3.7 billion years ago, as early life arose
-- Read more on ScientificAmerican.com
https://www.scientificamerican.com/artic...e-thought/