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8
5 STORY ONE
s s Narrowing in on the number
ofshumansgenes
8 lifE
s s Bacteria “pop wheelies”
s s Circuit of life: Microbial wires
transferselectrons
s s Snails leap into slugdom
s s Giraffe-sized pterosaurs took
cross-continentalsflights
18 iRON iN Th E Mix
A new class of superconducting
materialssmaysprovidescluesstos
howssomescompoundssconducts
electricscurrentswithoutsresis-tancesatshighstemperatures.
By Gwyneth Dickey
12
10 bOd Y & bRaiN
s s Dining schedule affects
weightsgainsinsmice
s s How the deaf brain rewires
s s Runaway blood sugar not the
solesculpritsinskidneysdamage
s s Implants help heroin addicts
kickstheshabit
22 MaSSaCRE a T SaCREd RidgE
COVER STORY: A bloody beating
atsasPueblossitesinssouthwests
Coloradoslooksslikesansearlys
examplesofsgenocidestosones
researcher,sbutsotherssdisagree.
By Bruce Bower
28 SMOkE fROM a diSTaNT fiRE
Fire-fueled storm clouds can
loftsaerosolsshighsintosthes
atmosphere,swheresplumesss
ofsthestinysparticlesscanstravels
longsdistances.s
By Sid Perkins
12 EaRTh
s s Sensor-toting seals map the
seafloor
s s A protective role for glaciers
Departments
2 fROM ThE Edi TOR
13 Ma TTER & ENERg Y
s s Scotch tape mimics particle
accelerators
4 NOTEbOOk
30 bOOkShElf
31 fEEdbaCk
18
14 a TOM & COSMOS
s s Hubbub over habitable planet
s s Tailed asteroid isn’t a comet
s s Titan re-creation hints that
lifescouldshavesbegunsinssky
s s Fizzy sea could feed geysers
onsSaturn’ssmoon
32 COMMENT
Katherine Wallman, the
UnitedsStates’schiefsstatistician,s
explainsswhystheswholesnations
shouldscaresaboutsnumbers.s
28
16 huMaNS
s s To remember better, quiz
yourself
s s Ignorance as bliss in
long-termsrelationships
www.sciencenews.org
November 6, 2010 | science news | 1
