Dast12

The Sunlight takes 8 minutes and 20 seconds to reach the earth, plus the earth's atmosphere refracts the light when the sun is setting and rising, so it must travel through more of the atmosphere for another 2 minutes after the sun has gone down. That's why we can't see the Sun's real position! When the Sun is overhead the atmosphere doesn't refract the light!

These black-clad warriors emerged from the shadows in the 16th century, when hundreds of power-hungry warlords squabbled over control of Japan. A ninja might work for a warlord one year, and then spy on that same warlord the next.

When a breeze strikes a turbine a windmill-like machine that converts wind into electricity it spins propeller blades connected to gears inside the turbine's housing.

Why is The Ocean Salty! Each drop of refreshing rainwater contains an itty-bitty bit of carbon dioxide absorbed from the air. That gas gives rain a slightly acidic bite which washes away rocks and soil when the drops splash against the ground. This process creates salty sodium and chloride ions that follow streams and rivers into the ocean. All those ions add up.

Each time you enter a word or phrase into a search engine a lot of things happen behind the scenes in about 1/8 of a second. The search engine uses algorithms to determine exactly what you're hunting for, adding in synonyms, anticipating your terms before you've even finished typing and offering corrections in case you've made a mistake.