potentially adverse effects of coffee on the heart could be less hazardous in regular drinkers with normal blood pressure.
The link here doesn't seem very clear. Are they trying to say that blood pressure rises with occasional use, but regular drinkers don't suffer raised blood pressure?
The Earths crust is around 10 kilometres thick under the ocean: on land, it averages 50 kilometres. That's a lot of rock to try and tunnel through, let alone keep a shaft open in.
the blood pressure of occasional drinkers rose.
Followed by:
potentially adverse effects of coffee on the heart could be less hazardous in regular drinkers with normal blood pressure.
The link here doesn't seem very clear. Are they trying to say that blood pressure rises with occasional use, but regular drinkers don't suffer raised blood pressure?
Good God, is there anything that Dirk Pitt can't do?
;)
NUMA must be -really- branching out.
The Earths crust is around 10 kilometres thick under the ocean: on land, it averages 50 kilometres. That's a lot of rock to try and tunnel through, let alone keep a shaft open in.