KnowraZhang HengLinked fromLinked fromThe 5 pages that link to Zhang Heng, each with the reason it gives.All 5Broader topic 1Related 3Compared with 1SeismologyRelated: The earliest known device for detecting distant earthquakes.Armillary sphereRelated: Historical accounts credit Zhang Heng with improving a water-powered armillary sphere.Eastern HanRelated: His career exemplifies the scientific and literary culture of the dynasty.