In terms of pure science, the discovery that the universe is in the grip of a strange "anti-gravity" force that is making it expand ever faster, is the most significant of the last decade. The possibility that such a force might exist has been known for years, with theorists finding that it kept reappearing out of Einstein's theory of gravity. For years they tried to avoid it coming up with all sorts of arguments for why the force couldn't really exist. Now they're being forced to face it, and to face the embarrassing fact that they can't explain the single most important force in the universe.
According to the passage, the expansion of the universe ____.
is now slowly losing speed
has been explained with reference to the anti-gravity force
seems to contradict the existence of an anti- gravity force
cannot continue indefinitely
will result, in the end, in the elimination of the anti-gravity force
As it is pointed out in the passage, the idea that there might be an anti-gravity force in the universe ____.
is by no means a recent one
was pioneered by Einstein
has hardly ever received any serious scientific interest
has little connection with any serious scientific theory
is now completely outdated
According to the passage, scientists involved in the study of the universe ____.
were eager to establish the existence of an anti-gravity force
have, for many decades, focused on the effects of the anti-gravity force
are the only ones to be interested in an anti- gravity force
have now come to question the validity of Einstein's theory of gravity
attempted, for a considerable time, to demonstrate that there was no anti-gravity force
As we learn from this passage, it is scientifically discomforting that the anti-gravity force ____.