When Joseph Cook first landed on the Greenland ice sheet in 2010, he was expecting to see a pristine white environment. What he found was a “colorful patchwork” — from blacks and grays to greens, purples and browns, with neon blue melt streams cutting through the ice.
A new map points out U.S. rivers most worth protecting 
Exhaling may speed up reaction times 
A medieval remedy could offer ideas for beating antibiotic resistance 
In the wake of the flood, could Nepal avert the next disaster? 
‘The Deep End’ podcast is back to explore what makes your voice yours 
Magnetism may have helped kick-start our solar system 
Could a new global panel defuse inequality’s ‘ticking time bomb’? 
Homicides fall as organised crime grows more profitable – and networked 
Somali families face renewed violence amid worsening hunger crisis 
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