Connecting the lincs As a physician, I was absolutely astounded reading “Missing lincs” (SN: 12/17/11, p. 22) and still am. We have been waiting since DNA was discovered to find this ‘what makes us human’ aspect of our biochemistry. Even in the infancy of this research, we are discovering the chemical reasons for a type of muscular dystrophy and other conditions. What I find especially illuminating is that this may be the etiology of what we call autoimmune diseases, among other problems. I am sure we will find it is a change in lincRNA balance or function that produces the change in regenerative ability of infants’ hearts mentioned in “Reviving a tired heart” (SN: 10/22/11, p. 26). Linda Mendoza, Chico, Calif. We are beginning to unravel the questions of how so few genes and also how so many genes in common across species can lead to the diversity and complexity that...

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March 9–18 The British Science Association’s National Science and Engineering Week explores the theme “Our World in Motion” with events across the United Kingdom. See bit.ly/zqeESh March 17–23 Enjoy science demonstrations and hands-on fun for the whole family at the San Diego Festival of Science and Engineering. Find the schedule of events at www.sdsciencefestival.com

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BOILING REACTOR WILL MAKE SUPERHEATED STEAM — An Argonne National Laboratory experimental reactor achieved criticality for the first time Feb. 9 at the National Reactor Testing Station near Idaho Falls, Idaho. The plant, known as Borax 5, was built at a cost of nearly two million dollars. It will test the feasibility of making superheated steam by utilizing uranium fuel. The steam, in turn, would be used to drive a turbine to produce power. Borax 5 is designed to produce 20,000 kilowatts of thermal power at its maximum capacity. Nuclear superheated steam as used in the Borax 5 is expected to increase plant efficiency and eventually reduce the cost of nuclear fuel. The nuclear cores of the reactor are shown on the cover.

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