- sharks are immune to all known diseases
- sharks can sense a drop of blood from 4km (2.5miles) away
- sharks have been on Earth for over 400 million years
- sharks never stop moving even when they sleep or rest
- sheep won't drink from running water
- shrimps are all born male but slowly grow into females
- siderodromophobia is the fear of trains
- Sir Isaac Newton was 23 when he discovered the law of gravity
- skiing is the only word with double i
- small dogs usually live longer than larger breeds
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