- Chalk is made from tiny plankton fossils.
- The doorbell was invented in 1831.
- No two spider webs are the same.
- Paper originated from China.
- The alchemy symbol for water is an inverted triangle, resembling a cup or glass.
- An octopus pupil is rectangular.
- Months that start on a Sunday will always have a Friday the 13th.
- Heat, not sunlight, ripens tomatoes.
- The revolving door was invented in 1888.
- There are over 80,000 different species of ants.
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