Life began on Earth more than 3.5 billion years ago, but the history of humans and other vertebrates accounts for only a fraction of this timescale. Chordates (a group that includes vertebrates) and echinoderms (like starfish ...
Evolution
Feb 23, 2023
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(Phys.org)—In a primitive marine organism, MBL scientists find photosensitive cells that may be ancestral to the "circadian receptors" in the mammalian retina.
Cell & Microbiology
Feb 6, 2013
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The climate after the largest mass extinction so far 252 million years ago was cool, later very warm and then cool again. Thanks to the cooler temperatures, the diversity of marine fauna ballooned, as paleontologists from ...
Earth Sciences
Dec 21, 2012
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(PhysOrg.com) -- Most primitive known vertebrate and therefore the ancestor of all descendant vertebrates, including humans, discovered.
Archaeology
Mar 5, 2012
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