Earth is about 4.5 billion years old. Scientists think that by 4.3 billion years ago, Earth may have developed conditions suitable to support life. The oldest known fossils, however, are only 3.7 ...

Dave Ramsey has blunt words on your 401(k) and IRA for retirement Ukrainian F-16 pilot says Russia's battlefield actions show its troops think NATO jets are higher quality and fear them China ...

NASA’s Curiosity rover has unearthed the largest organic molecules ever detected on Mars—possible fragments of fatty ...

Perhaps the most compelling reason to understand “deep-time” climate change is in how it relates to the origin and evolution of life on Earth ... 3.9 to 2.5 billion years ago (Bya) (Figure ...