Earthquakes are unsettling, but a swarm of earthquakes can be downright scary, and some San Francisco residents are worried the Big One is near.
Opinion
Civil Mentors Official on MSNOpinion
Why bridges collapse, the 10 most common failure triggers engineers watch for
Bridge collapses are rarely caused by a single dramatic moment. This video breaks down the 10 most common reasons bridges fail, from floods and earthquakes to corrosion, design flaws, and overlooked ...
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