There are roughly a trillion species of microorganisms on Earth—the vast ... to use oxygen long before the Earth became ...

A new study reveals that Earth's biomes changed dramatically in the wake of mass volcanic eruptions 252 million years ago.

The American Society of Civil Engineers' report card for U.S. infrastructure gave its highest-ever overall grade, though ...

(MENAFN- The Conversation) There are roughly a trillion species of microorganisms ... became saturated with it roughly 2.4 billion years ago. A monumental event in Earth's history About 4.2 ...