8
9
20
26
In The News
5 STORY ONE
s No link found between
viruses and chronic fatigue
8 EARTH
s Paired Pacific volcanoes fed
by parallel magma sources
s Crystal cavern up to a million
years in the making
9 GENES & CELLS
s Fluorescent cats engineered
to better fight feline AIDS
10 MOLECULES
s New bomb material goes
boom only when needed
s DEET throws bugs a curve
11 LIFE
s Cave fish flits to its own clock
s Frogs pull water from thin air
12 SCIENCE & SOCIETY
s Scientists, teen and tween,
win big at competition
s 2011 science Nobels awarded
14 HUMANS
s Fossils shed new light on
possible Homo ancestor
s In photos of strangers, it’s
hard to tell who’s who
16 BODY & BRAIN
s In obese people, brain craves
food even when stomach is full
s The brain sees some scenes as
the sums of their objects
18 ATOM & COSMOS
s Little exoplanets on the rise
s Neutrinos allegedly break
light-speed barrier
Features
20 A SHADOWED PAST
The moon’s childhood remains
shrouded in mystery.
By Nadia Drake
22 THE ULTIMATE CLOCK
COVER STORY: A proposed
atomic timekeeper would lose
or gain just one second every
32 billion years.
By Charles Petit
26 REVIVING A TIRED HEART
Scientists turn to new cells to
replace tissue that no longer
pumps blood.
By Laura Beil
Departments
2 FROM THE EDITOR
4 NOTEBOOK
30 BOOKSHELF
31 FEEDBACK
32 FROM THE ARCHIVE
How the rubbery world of
topology may help describe
the universe.
