A low level of atmospheric oxygen in Earth’s middle ages held back evolution for two billion years, raising fresh questions about the origins of life on this planet.
New research by the University of Exeter explains how oxygen was trapped at such low levels. (more…)
A significantly greater number of students fail science, engineering and math courses that are taught lecture-style than fail in classes incorporating so-called active learning that expects them to participate in discussions and problem-solving beyond what they’ve memorized.
Active learning also improves exam performance – in some cases enough to change grades by half a letter or more so a B-plus, for example, becomes an A-minus. (more…)
