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Ask anyone what danger you face when using a ladder, and the likely answer will have to do with falling off the ladder. True, that is a danger. But it’s not the only one. Let’s look at some others.

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...