Three years ago, observations of distant, exploding stars blew to smithereens some of astronomers' most cherished ideas about the universe. To piece together an updated theory, they're now thinking dark thoughts about what sort of mystery force may be contorting the cosmos.
Note: To comment, Science News subscribing members must now establish a separate login relationship with Disqus. Click the Disqus icon below, enter your e-mail and click “forgot password” to reset your password. You may also log into Disqus using Facebook, Twitter or Google.