Riddle #1148

I am only useful when I am full, yet I am always full of holes. What am I?

I am a mother and a father, but have never given birth. I'm rarely still, but I never wander. What am I?

A name of an animal minus the first three letters plus a flat piece of wood. What am I ?

Physicists have built devices to move me very fast. My last seven letters can be commonly found in newspapers, magazines and journals. What am I?

I am a five letter word. If you remove all letters one by one from the last, I sound the same! What am I?

As small as your thumb, I am light in the air. You may hear me before you see me, but trust that I'm there. What am I?

I can swim or walk for miles. I’m big with thick, white hair. I live up in the Arctic. What I am?

Poke your fingers in my eyes and I will open wide my jaws. Linen cloth, quills, or paper, I will devour them all. What am I?

I always work under pressure and by myself is the only way I'm hurt. I was formed under pressure and for woman I'm pleasure. What am I?

I am a home of knowledge, both banal and profound. In grand halls and small homes I can be found. I am a home for things of many leaves, but my many residents are not living trees. What am I?

I dig out tiny caves, and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help, yet many people are afraid to let me help them. What am I?