India's richest man, Mukesh Ambani, has moved into his new home in Mumbai — a 27-storey mansion worth $1 billion. The house, named Antilia, has three helipads, a dance studio, a ball room, a 50-seat theatre and an underground car park for 160 cars. The 27-floor building (560 ft or 173 m) will be home to Ambani, the richest man in India and the fourth richest in the world, plus his wife Nita, their three children - daughter Isha and sons Akash and Anant - and mother Kokilaben. The family will...