Word: einsteins
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...flatness of space-time must be confirmed before they are accepted without reservation. "We're really living dangerously," says Chicago's Turner. "We've got this absurd, wonderful picture of the universe, and now we've got to test it." There could be surprises to come: an Einstein-style cosmological constant, for example, is the leading candidate for dark energy, but it could in principle be something subtly different--a force that could even change directions someday, to reinforce rather than oppose gravity...
...ALBERT EINSTEIN when: 1916 what he did: Introduced the "cosmological constant," a form of antigravity, to make general relativity agree with a cosmos that seemed not to be expanding...
...Person of the Century: Albert Einstein...
...EDWIN HUBBLE when: 1927 what he did: Discovered that faraway galaxies all seem to be flying away from Earth, which suggested that the universe was in fact expanding. In doing so, Hubble gave Einstein scientific license to abandon the cosmological constant, whose creation the brilliant physicist dubbed the greatest blunder of his career. In retrospect, it was an inspired guess that could have won him another Nobel Prize...
...ADAM RIESS when: 1998-2001 what he did: Helped prove that Einstein was right in the first place: a mysterious antigravity force that acts like Einstein's cosmological constant is evidently quite real