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Some of the most fantastical denizens of the ocean realm are invisible to the naked eye
New evidence shows that a controversial fossil may be the oldest human ancestor
Consumer genetic-testing companies report how much of one's DNA comes from archaic human species, but what do the results really mean?
Adaptation to a starchy diet may have been key to the domestication of dogs and cats
Light microscopy reveals hidden marvels of the natural world
Humans are not alone in aiding others
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