"Grassoline at the Pump": Scientists are turning agricultural leftovers into a huge variety of biofuels.
"From the Moon to Mars": The lunar module pilot for the Apollo 17 mission offers some pointers for future explorers of Mars.
"Origins of the Left & Right Brain": The division of labor by the two cerebral hemispheres - once thought to be uniquely human - predates us by half a billion years.
"The Ivory Trail": New forensic tools based on DNA analysis can help stop the cartels behind the illegal slaughter of African elephants for ivory.
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