A microorganism whose evolutionary roots can be traced to the era of the first multicellular animals may provide a glimpse of how single-celled organisms made a critical evolutionary leap. In ...

To study evolutionary morphings, scientists often look at teeth, which are well preserved and thus well represented in the fossil record. But scientists can do more than observe the traces left behind ...

A 370-milion-year-old, primitive fish sported a weird pair of fins just below its anus, new research shows. The strange appendages, detailed today (April 9) in the journal Biology Letters, were found ...

Single-celled organism harbors protein sensor that was thought to be restricted to multicellular animals. A microorganism whose evolutionary roots can be traced to the era of the first multicellular ...

Choanoflagellates are primitive microorganisms whose evolutionary roots can be traced to the era of the first multicellular animals (metazoans). In December 18 Proceedings of the National Academy of ...

Old World monkeys (Cercopithecoidea) are a highly successful primate radiation, with more than 130 living species and the broadest geographic range of any extant group except humans. Although ...

Different views exist as to the character of the social norms operating in primitive society. Marxist science defines them as moral norms, customary law, or customs. Non-Marxist science regards them ...

A 370-milion-year-old, primitive fish sported a weird pair of fins just below its anus, new research shows. The strange appendages, detailed Tuesday in the journal Biology Letters, were found on an ...