I make two people out of one. What am I?

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

When we see 2 but call 10?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

What kind of storm is always in a rush?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

What does a man do only once in his lifetime, but women do once a year after they are 29?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

After a heavy Thanksgiving meal, the night watchman went to work. In the morning, he told his boss he had dreamed that a saboteur planted a bomb in the factory and that he felt it was a warning. The boss promptly fired him. Worker confused, Why boss fire him?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?