A study of very old rocks has revealed that Earth’s first ‘Snowball’ phase was a much more intense deep freeze than previously thought.
A study of very old rocks has revealed that Earth’s first ‘Snowball’ phase was a much more intense deep freeze than previously thought.
Though it’s generally agreed upon that the planet was quite icy about 2.4 billion years ago, it’s often theorized that parts of oceans remained more slush than solid.
Those theories, however, were developed with the use of climate models, not an examination of actual objects that were around at the time.
A recent analysis of materials aged 700 mil
