Question

read the paragraph about eadweard muybridges horse in motion photographs. select the sentence that should be removed to improve the focus of the paragraph.
in 1878, photographer eadweard muybridge set out to answer a question about animal physiology: when a horse is galloping at full speed, are all four of its hooves ever off the ground at the same time? to find his answer, muybridge photographed a real horse galloping at a track in palo alto, california. while palo alto used to be famous for its horse races, it is now known as a thriving center for technological research. as the horse raced around the track, it triggered threads on a dozen cameras muybridge had put in place. once tripped, each camera took a picture. the resulting series of images, which muybridge titled horse in motion, revealed that a horse at mid - gallop does indeed briefly have all four hooves simultaneously in the air. more importantly, horse in motion showed the world how cameras could reveal things too difficult to perceive with the human eye alone.

Explanation:

The paragraph is about Muybridge's horse - motion photographs and the question about horse physiology. The sentence about Palo Alto's current status as a technological research center is off - topic.

Answer:

While Palo Alto used to be famous for its horse races, it is now known as a thriving center for technological research.