“Deep Freeze!” –Early Earth Froze Over in a Geological ‘Blink of an Eye’

    Some scientists think that during several ancient episodes, the planet plunged into a deep freeze known as “Snowball Earth,” when ice sheets grew to cover almost the entire planet. However, the number of these episodes, their extent, and just how fast Earth turned into an ice cube have long been a mystery. Now, … Continue reading “Deep Freeze!” –Early Earth Froze Over in a Geological ‘Blink of an Eye’