George Church, Matthieu Landon, and Michael Napolitano discuss the genetic replacement of arginine codons in E. coli.

Kip Thorne and Rai Weiss describe the detection of gravitational waves with LIGO.

Eileen Crimmins discusses the mortality difference between the sexes and its possible causes.

Kavli Prize winner Eve Marder discusses flexibility and stability in neural circuits.

Joshua Elliott discusses potential impacts of climate change on water availability for irrigation.

Andrea Rinaldo explains how cell phone data can be used to model disease spread.

Amanda Woerman discusses the role of the alpha-synuclein prion in the neurodegenerative disorder multiple system atrophy.

Anne Case and Angus Deaton describe recent changes in mortality trends for white non-Hispanic Americans.

Glaucio Paulino and Evgueni Filipov describe an origami-inspired approach to designing deployable structures and metamaterials.

Mark Jacobson explains the feasability of a 100% wind, water, and solar power grid in the continental United States.