Matter & Energy

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quartz spheres with Einstein photo

TESTING EINSTEIN  The Gravity Probe B mission used almost perfect spheres made of quartz to measure two predicted effects of Einstein’s general theory of relativity. 

illustration of Earth's magnetic field

MAGNETIC SHIELD  The planet’s magnetic field isn’t on the cusp of a catastrophic flip of the magnetic poles, new lava analysis suggest. A magnetic reversal would weaken Earth’s magnetic field, causing auroras closer to the equator, as seen in this artist’s illustration. 

Hofburg Palace, Vienna

A basement corridor of Hofburg Palace in Vienna served as the laboratory for an experiment that confirmed the counterintuitive workings of quantum physics.

Matter & Energy

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