In the Himalayan valley of Kullu, in Himachal Pradesh, there sits a Shiva temple on whose property is erected a sixty-foot iron pole. According to an ancient tradition, the pole attracts the “blessing of heaven,” and a Shiva lingam is placed underneath. During storms the pole acts as a lightning rod, carrying electricity down to the lingam and shattering the object. The broken pieces are collected by the temple priest and used for the next blessing.

In 1783 an English rector named John Michell wrote to the physicist Henry Cavendish of his belief in the possibility of “dark stars,” entities so dense and with such a strong gravitational pull that they could prevent light from escaping them and render them invisible. The Royal Society published his theory the following year, but it would be nearly two hundred years before the term black hole was used to refer to such a phenomenon.