This Is Why Ninjas Carried Crickets
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Key Facts In This Video
Ninjas are said to have told time by looking at a cat's eyes—the pupils are narrower at midday and wider at dusk. 00:04
Ninjas often carried a small box of crickets—the chirping disguised any stray sound the ninjas made. 01:26
Ninjas would pass along secret information by using different colored rice. 01:46