Ninjas used a system called Goshiki-mai, meaning Five Colored Rice, in which rice grains were painted red, blue, yellow, black or purple in order to leave coded messages or trails.
The Eiffel Tower Can Be 15 cm Taller in Summer: Due to thermal expansion, the metal expands when it gets hot, making the tower slightly taller during warmer months.
🌿 Fun Fact: Oak trees (genus Quercus) can support over 500 species of insects, making them a keystone species in many forest ecosystems. Their presence increases biodiversity and stabilizes entire woodland environments.
Now imagine what I’m doing
