Tiny sea creature's genes shed light on evolution of immunity

How a tiny marine invertebrate distinguishes its own cells from competitors' bears striking similarities to the human immune system, according to a new study led by University of Pittsburgh School of Medicine researchers.

Understanding friction, the unavoidable enemy

For machines with mechanical elements, friction is an unavoidable enemy. It is a major source of service failure and can reduce the lifespan of any machinery, from bicycles and cars to airplanes and assembly lines.

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