Genome scientists go out on a limb of the tree of life
Quick. Would you know a placozoan if it bit you? Not that it actually would attack, unless you were as small as a fleck of algae. And even then, it wouldn't bite but would instead clamp down and ooze digestive enzymes. Yet this summer, placozoans—the simplest of free-living multicellular animals—and some other, equally nonfamous creatures made the list of targets for the next wave of DNA
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