Clues in the clay: Scientists narrow the search for the first animals
Using a particular type of sedimentary rocks as their guide, researchers begin to tackle the question of when animals first appeared on Earth.
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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.