Dear Dr B: Where does dark energy come from and what�s it made of?

�As the universe expands and dark energy remains constant (negative pressure) then where does the ever increasing amount of dark energy come from? Is this genuinely creating something from nothing (bit of lay man�s hype here), do conservation laws not apply?

Puzzled over this for ages now.�

-- pete best



�When speaking of the Einstein equation, is it the case that the contribution of dark