Tackling the forensic unknowns of 3-D-printed firearms

In the summer of 2016, Transportation Security Administration screeners at Reno-Tahoe International Airport in Nevada confiscated an oddity: a 3-D-printed handgun in a man's carry-on baggage.

The moon is quaking as it shrinks

A 2010 analysis of imagery from NASA's Lunar Reconnaissance Orbiter (LRO) found that the moon shriveled like a raisin as its interior cooled, leaving behind thousands of cliffs called thrust faults on the moon's surface.

A solution to fracture for durable solar cells

Micro cracks in solar cells are a frequent challenge for manufacturers of solar photovoltaic modules. EU-funded researchers introduced an innovative pre-stressing technique to retard the growth of cracks and make durable ...

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