How accurately is the Great Pyramid aligned?
The Great Pyramid's sides are aligned almost exactly with true north, south, east, and west, a stunning feat of precision for ancient engineers.
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- Why did the Golden Gate Bridge start humming?
“After new railings were installed in 2020, the Golden Gate Bridge started making a humming sound in strong winds.”
Reference: San Francisco Chronicle
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When did the Golden Gate Bridge open?
The Golden Gate Bridge opened in 1937 and had the longest main span of any suspension bridge in the world until 1964.
Why does helium make your voice squeaky?
Helium makes your voice sound high and squeaky because sound travels faster through helium than through air, which changes the resonance of your vocal tract.