World
School roof collapses in northwestern Pakistan, killing at least 35 people
At least 34 students and a teacher killed in incident at Al-Khair Education Centre, a private school in Peshawar.
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Northwestern
Science
Scientists find that “perfect” systems may be surprisingly fragile
Complex systems may work better when their parts are not perfectly alike. Northwestern physicists found that carefully balanced variation, or “disorder,” can make networks such as power grids, ecosystems, neurons, and materials more stable. Even random differences sometimes improved stability compared with completely uniform systems. The discovery could help researchers design more resilient technologies and explain why natural systems are so rarely perfectly uniform.