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  1. Predation risk affects reproductive physiology and demography of elk.

    Science 315(5814):960 (2007) PMID 17303746

    Elk (Cervus elaphus) in the Greater Yellowstone Ecosystem alter patterns of aggregation, habitat selection, vigilance, and foraging in the presence of wolves (Canis lupus). Antipredator behaviors like these can reduce predation risk but are also likely to carry costs. Data from five elk populations...
  2. Ghosts from the past.

    Science 345(6195):361 (2014) PMID 25061179

  3. Neuroscience. Astrocytes eyeball axonal mitochondria.

    Science 345(6195):385 (2014) PMID 25061193

  4. Top heart lab comes under fire.

    Science 345(6194):254 (2014) PMID 25035470

  5. Electro-optical frequency division and stable microwave synthesis.

    Science 345(6194):309 (2014) PMID 25035489

    We demonstrate optical frequency division and microwave generation by using a tunable electrical oscillator to create dual combs through phase modulation of two optical signals that have a stable difference frequency. Phase-locked control of the electrical oscillator by means of optical frequency di...
  6. Human tRNA synthetase catalytic nulls with diverse functions.

    Science 345(6194):328 (2014) PMID 25035493

    We chose aminoacyl tRNA synthetases (AARSs). They are exceptional in their progressive and accretive proliferation of noncatalytic domains as the Tree of Life is ascended. Here we report discovery of a large number of natural catalytic nulls (CNs) for each human AARS. Splicing events retain noncatal...
  7. Tell the negative committee to shut up.

    Science 345(6194):350 (2014) PMID 25035495

  8. End of AIDS--hype versus hope.

    Science 345(6193):166 (2014) PMID 25013065

  9. Imaging techniques. Ultrafast low-energy electron diffraction in transmission resolves polymer/graphene superstructure dynamics.

    Science 345(6193):200 (2014) PMID 25013072

    We have developed ultrafast low-energy electron diffraction and investigate in transmission the structural relaxation in a polymer/graphene bilayer system excited out of equilibrium. The laser-pump/electron-probe scheme resolves the ultrafast melting of a polymer superstructure consisting of folded-...
  10. This Week's Section.
    Author(s) unavailable

    Science 344(6180):134 (2014) PMID 24723583