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I’ve written before about ancient diseases of the ice age , but this time I’m going even further back in time, to diseases that were present in the first human-like hominids. Although many human infections only developed after human settlements and animal domistication, early human ancestors would still have been fighting off bacteria and other nasty diseases.

Federal health officials confirmed four people in three states have died from the bacterial infection listeria, traced to contaminated cantaloupe from a Colorado farm. Dr. Jennifer Ashton reports

Dr. Jennifer Ashton answers questions about the bacterial strain that has now spread to 11 countries

People may advise you to listen to your gut instincts: now research suggests that your gut may have more impact on your thoughts than you ever realized. Scientists from the Karolinska Institute in Sweden and the Genome Institute of Singapore led by Sven Pettersson recently reported in the Proceedings of the National Academy of Sciences that normal gut flora, the bacteria that inhabit our intestines, have a significant impact on brain development and subsequent adult behavior. We human beings may think of ourselves as a highly evolved species of conscious individuals, but we are all far less human than most of us appreciate.