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A guinea pig clotheshorse, an eye-opening eye, and a glittering galaxy are among the week's best news photos.

The hippodrome—where chariots and horses raced in the most prestigious events of the ancient Olympics—has been located in Greece with geomagnetic technology, researchers believe.

A newfound link between bursts of energy in magnetic field lines and brighter auroras may solve a 30-year mystery about the polar lights, researchers say. With video.

The total length of the underground calcite river is still unknown, though a recent expedition surveyed several thousand more feet of the odd formation in New Mexico Cave.

Young female red-fronted lemurs adopt male coloration to dupe their aggressive female groupmates, a new study found.

The European Union proposes banning products from seals killed in a "cruel" way. The move targets Canada, where harp seals are killed with rifles, spiked clubs, and other weapons. Warning: video contains graphic imagery.

The twin barn swallows don't show physical features associated with the genetic abnormality, leaving experts unsure how the young birds came to be literally attached at the hip.

The path of totality will sweep across northern Canada into central Russia and Mongolia before ending in China, and experts are urging safe viewing practices among sky-watchers. With video.

With most Greek and Roman god monikers already taken, astronomers are tapping into other cultures' mythologies to christen new cosmic bodies.

Cloned Labradors add up to quadruple cuteness, a rare lemur group is discovered in Africa, and more in our first weekly gallery of animal news photos.