Resumen de Dark Forces at Work.
The article discusses the discovery of the acceleration of the universe's expansion by astronomer Saul Perlmutter and notes the resultant research of dark energy. Some astronomers connect dark energy with physicist Albert Einstein's theory of a "cosmological constant." Suggestions about why the universe is accelerating in its expansion are mentioned. Perlmutter leads a group called the SuperNova Acceleration Probe. INSET: SAUL PERLMUTTER.
