The More You Take

You can enter

I have keys that open no locks, I have space, but you cannot fill it, You can enter, but you cannot leave. What am I?

I give man life

To mankind I am well known, Throughout the world I have shown, My destructive power when I act, Where ever I go I leave only black, I give man life...

With pointed fangs it sits in wait

With pointed fangs it sits in wait, With piercing force its doles out fate, Over bloodless victims proclaiming its might, Eternally joining in a single bite. What am I?

I run but never walk

I run but never walk, have a mouth but never talk, have a bed but never sleeps.