As the comet came closer, a substantial white coma of fluorescent gases and dust enveloped the nucleus and flared to the side and behind the racing object. Man’s imagination had always seen faces and forms in clouds, but these were always momentary spectres. This comet was different: its coma resolved itself into the shape of a white horse, its tail and mane whipped back as in a galloping steed. In time, the imaginative could also make out a figure seated on the horse, carrying what was a flaming sword in its hand. The End of Time tells how Kalki, the tenth avatar of Lord Vishnu, will manifest and deliver the world from the Kali Yuga, or the age of evil, darkness and ignorance, to Satya Yuga, the age of virtue and splendour. Yogesh Chandra seamlessly melds religion and faith with science and technology—computers, artificial intelligence, genetics and astronomy—to imagine what the end of time may look like and how life will be preserved to make way for a new age of enlightenment.