According to a new study published today in the journal Cell, the enterococci — gram-positive aerobic bacteria and a leading cause of hospital-acquired infections — arose from an ancestor that dates back 450 million years (Ordovician period), about the time when animals were first crawling onto land. This digitally-colorized scanning …
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Paleontologists have unearthed the remains of a previously unknown slug-like creature that lived during the Early Ordovician epoch, 478 million years ago. The discovery, reported in the journal Nature, sheds new light on the earliest stages in the evolution of mollusks, a group of invertebrates that includes clams, snails and …
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A new study published in the journal Nature Astronomy is the first to look at meteorites from before giant space collision 466 million years ago. This is an artist’s rendering of the space collision 466 million years ago that gave rise to many of the meteorites falling today. Image credit: …
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