If confirmed, the findings indicate that animals appeared on Earth millions of years earlier than previously believed.

In mice, epigenetic marks made on histones during infancy influence depression-like behavior during adulthood. A drug that reverses the genomic tags appears to undo the damage.

Electrical storms, rather than meteorites as scientists had previously thought, could have unlocked phosphorus necessary for the development of ancient life, according to a new study.

A new study finds mixtures of nucleotide types, rather than pure systems, are more likely to yield the building blocks of life.

New findings cast doubt on previous claims that structures found preserved in rocks in Greenland are stromatolites, but the original authors say the discrepancy lies in different samples.

Researchers find what appear to be 3.77 billion-year-old hints of microbial life hidden in Canadian rocks, but some scientists are not convinced.

New research uncovers previously unappreciated insights into the evolution of the well-studied energy-producing process.

In Chapter 9, “Life Gave Earth the Blues,” author Dorion Sagan addresses the planet’s exuberant color palette, evoking the contribution of industrious microbes.