Tagged With early earth

An international team of researchers say they have found fossils dating back to at least 3.77 billion years ago, making them the oldest fossils ever found on our planet. The discovery, though sure to attract scrutiny, has implications for our understanding of how life got started on Earth -- and how it may have emerged elsewhere.

Buried inside ancient grains of rock salt, a team of geologists has discovered traces of a breathable, animal-friendly atmosphere. If confirmed, the finding will push back the rise of oxygen on Earth hundreds of millions of years, raising new questions about the evolution of complex life both here and beyond our solar system.