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They say all roads lead to Rome. Unfortunately that ain’t all that roads lead to. A new study shows that roads can promote the spread of antibiotic-resistant bacteria.

Some graduate students in science, technology, engineering and math--or STEM--only do research, under the guidance of a mentor. Other STEM grad students also have teaching responsibilities, for example, instructing undergrads or local high schoolers. Now a study finds that grad students who also teach show significant improvement in written research proposals, compared with grad students with no teaching requirement

When it comes to handedness, righties rule. And according to a new study, they have for a long time. Because even half a million years ago, nine out of ten European humans favored their right hands