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.
Source: news8000.com
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Historic Courthouse Sequoias A Monument To John R Porter
The Hillsboro Herald is a Community paper written by local citizens.
Source: hillsboroherald.com
What rise of oxygen on early Earth tells us about life on other planets
Image by Devon Cole. When did the Earth reach oxygen levels sufficient to support animal life? Researchers from McGill University have discovered that
Source: miragenews.com
What the rise of oxygen on early Earth tells us about life on other planets
Deeper understanding of Earth’s atmosphere could help us identify signs of life beyond our solar system.
Source: mcgill.ca
An ancient mystery
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, Earth's 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, set the stage for a turning point in the history of life on Earth that is also among its most endurin...
Source: eurekalert.org