Archive of articles published on the 21st of February 2013

Could an old antidepressant treat sickle cell disease?
Explosives vapor detection technology: The new 'sniff test'
Early human burials varied widely but most were simple
Scientists unveil secrets of important natural antibiotic
Discovering the birth of an asteroid trail
Mercury may have harbored an ancient magma ocean
Research shows that coldness triggers northward flight in migrating monarch butterflies
How human language could have evolved from birdsong
Geoengineering by coalition
Caves point to thawing of Siberia
Research suggests malaria can be defeated without a globally led eradication program
Floral signs go electric
Researchers 'nanoweld' by applying light to aligned nanorods in solid materials
Should grandma join Facebook? It may give her a cognitive boost, study finds
Researchers propose new way to probe Earth's deep interior
Journey to the limits of spacetime
Influenza study: Meet virus' new enemy
Antibacterial protein's molecular workings revealed
Why sourdough bread resists mold
Why some soldiers develop PTSD while others don't
'Stressed' bacteria become resistant to antibiotics
Conserving corals by understanding their genes
Bees attracted to contrasting colors when looking for nectar
Life's tiniest architects pinpointed by Yale researchers
Penn researchers develop protein 'passport' that help nanoparticles get past immune system
Student loans help women more than men in reaching graduation