The theory behind slow lines: As our own science video contest is over, we'll forward you to a video from Bill Hammack, a University of Illinois professor who's also known as the engineer guy. In this great video that covers everything from network engineering to human psychology, he explains why some other line is always moving faster, and how to pick a store where that's not the case.
You look like you got your liver from your father: Most of the traits we inherit get passed on in the form of the sequence of bases in our DNA. But some of that DNA undergoes chemical modifications that can also be inherited (a process called imprinting). And lately, we've been finding more and more cases where this can do something unexpected: allow the inheritance of an environmental influence. In this latest case, male mice were raised on a low-protein diet. That influenced the imprinting of the genes that they passed on to their offspring, which ultimately got translated into changes in the expression of those genes. The end result was that the livers of the next generation showed elevated levels of genes involved in lipid metabolism. So, you are what you eat, but might also be a little bit of what your dad ate, too.
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