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In This Issue

You Are Who You Are by Default: It may be off when you’re on, but the brain network behind daydreams and a sense of self is no slacker
The Star That Ate a Mars: Astronomers study white dwarf pollution for clues to extrasolar planet ingredients
Bad Breath: Studies are homing in on which particles polluting the air are most sickening — and why
This week's table of contents

Wild Soay sheep on the islands of the St. Kilda archipelago in the North Atlantic have been measured and monitored by scientists for decades. All this data now explains why females have been slowly getting smaller with generations. Full Story Arpat Ozgul

SN Today:

Climate change shrinks sheep Milder winters help small, weak lambs survive but more competition for food slows growth. Read the full story. | Jul 2nd 2009 Found in: Life and Zoology
Concerns over bisphenol A continue to grow Recent research finds that the hormone mimic may be more prevalent and more harmful than previously thought, highlighting why BPA is a growing worry for policy makers. Read the full story. | Jul 2nd 2009 Found in: Biomedicine, Chemistry, Environment and Science & Society
Schizophrenia risk gets more complex Three studies find that large collections of variants, rather than just a few key mutations, probably predispose someone to schizophrenia. Read the full story. | Jul 1st 2009 Found in: Behavior, Biomedicine and Genes & Cells
Mass mismatch makes mystery for proton’s strange cousin An exotic cousin of the proton is caught in action again. But its measured mass doesn’t match previous results. Read the full story. | Jul 1st 2009 Found in: Matter & Energy and Physics
Dirty snow may bring green burst to mountain peaks Dust blowing in from distant deserts speeds the melting of snow and may shake up ecosystems on the slopes. Read the full story. | Jun 30th 2009 Found in: Earth and Environment

SN Multimedia:




The First Sound Bites	New species in Papua New Guinea	Interactive Darwin Timeline
Hear Sound Recordings from the 1908 presidential campaign	See photos of frogs and spiders recently discovered	View key events and discoveries related to evolution

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Hornets suffocate in bee ball
7.2.09 - Spike in carbon dioxide combined with heat may make honeybees' enemies vulnerable Found in: Life
New cyclone predictor
7.2.09 - Occasional sea-surface warming in central Pacific linked with more, stronger hurricanes in North Atlantic Found in: Earth
New drug hits leukemia early
7.2.09 - Molecular approach shows promise against deadly blood cancer Found in: Body & Brain and Genes & Cells
2-year-olds possess grammatical insights
7.1.09 - Brain responses suggest that toddlers already know fundamental rules for using nouns and verbs Found in: Humans and Psychology
Salamanders don’t regrow limbs from scratch
7.1.09 - Tissues in axolotl amputees regenerate themselves by “memory” Found in: Genes & Cells and Life
Salt stretches in nanoworld
6.30.09 - Finding could lead to new technique for making tiny wires Found in: Chemistry, Materials Science, Molecules and Physics
Flexible molars made chewing champions out of duck-billed dinosaurs
6.30.09 - Tiny scratches in the fossilized teeth of Edmontosaurus suggest these large herbivores may have had an unusual way of chewing Found in: Paleontology
H1N1 racks up frequent flier miles
6.30.09 - Analyzing global flights may help researchers track pandemics Found in: Body & Brain and Genes & Cells
Protein protects sperm in mice
6.29.09 - Older mice without GPX5 are more likely to have offspring with developmental defects Found in: Body & Brain and Genes & Cells
Rheumatoid arthritis drug clears hurdle
6.29.09 - Anti-inflammatory injections work in people who failed to improve on other meds Found in: Body & Brain