Editor summaries of this week's research papers.

Science This Week in Science
	Volume 351, Issue 6272

This Week in Science

Geophysics A silent and periodic earthquake trigger Brent Grocholski History of Science Babylonian astronomers tracked Jupiter Keith T. Smith Superconductivity Going to extremes to find superconductivity Jelena Stajic Cystic Fibrosis Airway infections put to an acid test Paula A. Kiberstis Immunology All T cells can remember Kristen L. Mueller Sex Chromosome Replacing the Y chromosome Beverly A. Purnell Lunar Formation Rehomogenizing the Earth-Moon system Brent Grocholski Metabolism Antisense now makes sense Megan Frisk Developmental Biology A MEK threshold in the placenta Nancy R. Gough Melanoma Initiation Visualizing the beginnings of melanoma Beverly A. Purnell Polymers Doubling down on polymerization Phil Szuromi Stress Response How cells keep going in the face of adversity Stella M. Hurtley Structural Biology Structure of a key spliceosomal complex Valda Vinson Surface Science Nanoclusters just by adding CO Phil Szuromi Oceanography Searching sediment for climate signals Brent Grocholski Biochemistry A special way to make T Guy Riddihough Conservation Patterns of biodiversity change Julia Fahrenkamp-Uppenbrink Evolution Genetics of bird mating systems Julia Fahrenkamp-Uppenbrink Molecular Evolution Environmental changes bridge evolutionary valleys Philip Yeagle