X-ray blaze on an invisible world

With laser-precise x-ray vision, the Linac Coherent Light Source will be an unprecedented tool to see how ultra-fast, ultra-small things work

The way that a horse trots intrigued Leland Stanford. After a term as California's governor and with a fortune assembled from building the US transcontinental railway, Stanford lived the life of a country gentleman near his Palo Alto Stock Farm. While innovatively training and breeding his famous thoroughbred racers, Stanford challenged the common belief in the late 19th century that when a horse runs, at least one hoof touches the ground at all times to steady and propel it. The debate raged among scientists, artists and horsemen, but the resolution remained a mystery too fast for the eye to perceive.

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