All mass creates a gravitational pull—yes, the same kind of gravity that pulls us towards earth. In fact, we weigh slightly less when the moon is directly overhead.
Atoms––which make up every single thing in the known universe––are 99.99% empty space.
Temperature changes can cause large buildings to noticeably grow and shrink. During summers in Paris, the Eiffel Tower can be almost 15cm taller.
The first public road in the world to be lit up by electricity was Mosley Street in Newcastle, a city in North East England, in 1879.
A bolt of lightning can measure up to one billion volts of electricity.
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