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“It’s at the root of our culture, giving us strength and identity,” said María Elena Álvarez-Buylla, a researcher in molecular genetics at the National Autonomous University of Mexico.

Sami Dridi, professor of poultry science specializing in avian endocrinology and molecular genetics, was responsible for conducting the experiment and the driving force in writing the paper.

Humans evolved to resist losing body fat so that we don’t become extinct, says Rudolph Leibel, chief of the pediatric molecular genetics division at Columbia University’s medical center.

To fully comprehend bonds and their consequences, we need science rich enough to accommodate ecology, evolution, neuroscience and molecular genetics, each of which offers a complementary view on how and why bonds form.

“There is no mechanism for them to alter anyone’s DNA,” said Emily Bruce, an assistant professor of microbiology and molecular genetics at the University of Vermont.