Answer:
Physicists have built devices to move me very fast. My last seven letters can be commonly found in newspapers magazines and journals.
The more of this there is the less you see. What is it?
I stand in one place yet I fill a whole room. I can be filled with molten rock and come in every hue.
I move very slowly at an imperceptible rate although I take my time I am never late. I accompany life and survive past demise I am viewed with esteem in many women's eyes. What am I?
First I may be your servant's name; then your desires I may proclaim; And when your mortal life is over hold all your wealth within my power.
A little house full of meat, no door to go in and eat.