Answer:
I'm a god. I'm a planet. I measure heat.
There are millions of me. I am very small but when moving fast I am deadly.
This thing all things devours: Birds, beasts, trees, flowers; Gnaws iron, bites steel; Grinds hard stones to meal; Slays king, ruins town, And beats high mountains down.
Sometimes black, sometimes white, I have veins but no blood
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
What language does a billboard speak?
Difficult
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?