In contrast, ancient Indian scholars, who envisioned a universe that repeatedly expanded and collapsed, estimated the Earth's age to be around 1.97 billion years. During the mediaeval period ...

What Was Happening on Earth at This Time The Precambrian is the earliest of the geologic ages, which are marked ... that appeared in the Precambrian era. Photograph by Joel Sartore, National ...

Analyzing gas trapped within different layers of the ice can tell us about Earth’s climate in the past — and give us clues to ...

Virginia Tech study unveils 2 billion years of evolution, highlighting the 'boring billion,' Snowball Earth, and ancient marine life.