Vol. 190 No. 2
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More Stories from the July 23, 2016 issue

  1. Neuroscience

    Properly timed exercise aids memory

    Well-timed exercise strengthens memories.

  2. Neuroscience

    Cocaine addicts can’t kick other habits either

    Habitual users tend to get stuck in nondrug-related habits more easily, too, pointing to a potential strategy for treatment

  3. Archaeology

    Lidar maps vast network of Cambodia’s hidden cities

    Laser survey unveils the extent, and the mystery, of Southeast Asia’s Khmer Empire

  4. Oceans

    Deep-sea hydrothermal vents more abundant than thought

    Ecosystem-supporting hydrothermal vents are much more abundant along the ocean floor than previously thought.

  5. Life

    For tooth decay microbes, many routes lead to kids’ mouths

    Mothers aren’t their children’s only source of bacteria that cause dental cavities, new research shows.

  6. Life

    Benign-turned-deadly bacterium baffles scientists

    Outbreak of Elizabethkingia continues to grow as disease investigators struggle to find source.

  7. Life

    Fido and Fluffy could unleash drug-resistant microbes

    After discovering resistant microbes in pets, scientists worry about the role of companion animals in the spread of resistant urinary infections.

  8. Oceans

    Coral bleaching event is longest on record

    Widespread coral bleaching continues, in the longest episode, over the largest area to date.

  9. Life

    Scientists find clue to why mitochondrial DNA comes only from mom

    Scientists have identified a protein that chops up the mitochondrial DNA in a dad’s sperm after it fertilizes an egg. The finding helps explain why mitochondrial DNA is usually passed on only by mothers.

  10. Planetary Science

    Earth has a tiny tagalong, and no, it’s not a moon

    Asteroid 2016 HO3 is a quasisatellite of Earth — orbiting the sun while never wandering far from our planet.

  11. Animals

    Reptile scales share evolutionary origin with hair, feathers

    Hair, scales and feathers arose from same ancestral appendage.

  12. Quantum Physics

    Quantum fragility may help birds navigate

    Birds’ internal compasses may rely on the delicate nature of the quantum world.

  13. Paleontology

    Parasites wormed way into dino’s gut

    Tiny slimed tunnels in the guts of a 77-million-year-old duck-billed dinosaur fossil offer the first hard evidence that dinosaurs may have been infected by parasitic worms, paleontologists say.

  14. Earth

    Winning helium hunt lifts hopes element not running out

    A volcanic region of Tanzania contains more than a trillion liters of helium gas, enough to fill 1.2 million medical MRI scanners — or hundreds of billions of balloons, researchers report.

  15. Climate

    Despite volcanic setback, Antarctic ozone hole healing

    The September extent of the Antarctic ozone hole has shrunk by about 4.5 million square kilometers since 2000, thanks in large part to the Montreal Protocol.

  16. Planetary Science

    New clues in search for Planet Nine

    Lots of unknowns remain as researchers try to pin down where a possible ninth planet might be hiding in the solar system.

  17. Life

    Artificial hearing has come a long way since 1960s

    Scientists envisioned artificial hearing 50 years ago. Today, they are working to make it superhuman.

  18. Microbes

    Thaw tests turn up dicey bagged ice

    Tests of bagged ice found that 19 percent exceeded recommended thresholds for bacterial contamination.

  19. Planetary Science

    The Juno spacecraft is now in orbit around Jupiter

    NASA’s Juno spacecraft successfully entered orbit around Jupiter, beginning a 20-month investigation of the giant planet’s interior.

  20. Animals

    Documentary looks for meaning in Koko the gorilla’s life

    'Koko — The Gorilla Who Talks' documents the nearly 45-year relationship between researcher Penny Patterson and Koko, the subject of an ape sign language project.