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Evolution has favored a gene causing decreased height and increased arthritis risk

60,000 years ago, when humans were migrating northward from Africa into colder climates, a single-letter DNA switch–from a G to an A–proved to help humans brave more frigid temperatures. Stanford University researchers have found, however, that this genetic change has also brought decreased height and resulted in increased risk of arthritis 1.3 to 1.8-fold in Eurasian populations.

Biology major to revamp, cut down on chemistry requirements

The biology department has announced a series of changes to come to the undergraduate biology major, including revamped chemistry and biology lab sequences, for the 2016-2017 school year. As a result of the new courses, rising biology and premedical students will be required to take significantly fewer chemistry courses. This primarily affects current freshman and other students who have not yet completed a track.

Beginning next year, biology students will only be required to take organic chemistry through CHEM 35: “Synthetic and Physical Organic Chemistry”, after which they can choose between two tracks: biochemistry or extended organic chemistry.