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gravitational waves

David Spergel
Q&A

A Bold Critic of the Big Bang’s ‘Smoking Gun’

July 3, 2014

The cosmologist David Spergel explains why a widely publicized gravitational-wave discovery could be wrong, and how the “overreaching” study could affect the public’s perception of science.

Q&A

Early-Universe Explorer Looks for Answers

July 3, 2014

Chao-Lin Kuo, who helped design the experiment that claimed to have found evidence of gravitational waves from the Big Bang, isn’t bothered by criticism that cosmic dust may account for his results.

Bicep2 B-modes
cosmology

Possible Echo of Big Bang Detected

March 17, 2014

Scientists report the possible discovery of primordial gravitational waves, ripples in space-time that carry a record of how the universe began.