Riddle #254

What is invisible and makes people suffer from symptoms like sweating and nausea, yet people can’t survive without it?

I heard of an invading, vanquishing army sweeping across the land, liquid-quick; conquering everything, quelling resistance. With it came darkness, dimming the light. Humans hid in their houses, while outside spears pierced, shattering stones walls. Uncountable soldiers smashed into the ground, but each elicited life as he died. When the army had vanished, advancing northward, the land was gree and growing, refresh.

What is the ancient invention that allows people to see through walls?

What has a head, a tail, is brown, and has no legs?

What is as big as you are and yet does not weigh anything?

What has hands but can not clap?

It regulates our daily movements, but it feels no interest in our lives. It directs us when to come and go, but does not care if we pay attention. What is it?

I follow you all day long, But when the night or rain comes, I am all gone.

What is round on both ends and hi in the middle?

To you, rude would I never be, Though I flag my tongue for all to see. What am I?

Brothers, all pair up; Bodies firm and tall. You only care to eat the solid food, And don’t care to eat the soup.