Susannah Porter News Today

Using a particular type of sedimentary rocks as their guide, researchers begin to tackle the question of when animals first appeared on Earth.

Fat-like compounds in ancient rocks point to a vast array of previously unknown microbes that once dominated complex life on Earth

(CNN) — Plants, algae, fungi, and animals — including humans — are all eukaryotes: life forms with complex, nucleus-containing cells.

Billion-year-old rocks reveal traces of ancient life

(CNN) — Plants, algae, fungi, and animals — including humans — are all eukaryotes: life forms with complex, nucleus-containing cells.

(CNN) — Plants, algae, fungi, and animals — including humans — are all eukaryotes: life forms with complex, nucleus-containing cells.

The Hillsboro Herald is a Community paper written by local citizens.

Image by Devon Cole. When did the Earth reach oxygen levels sufficient to support animal life? Researchers from McGill University have discovered that

Deeper understanding of Earth’s atmosphere could help us identify signs of life beyond our solar system.

 E-Mail Early Earth was no place to be. Hot, oxygen-free and subject to cataclysmic cosmic bombardments, our planet some 4.5 billion years ago was inhospitable to life as we know it. And yet from this early awkward stage, thanks to the metabolism of primitive single-celled organisms, Earths atmosphere changed. Oxygen levels rose first in the shallow surface waters and atmosphere, and 2 billion years later in deeper waters. This Great Oxidation Event, which began about 2.4 billion years ago, se...