Human beings have always needed somewhere safe and comfortable to live - somewhere away from the world outside.At night, they brought their cows and goats into the centre, safe from dangerous animals.Some Masai have continued living in communities like this until today.Our ancient ancestors often used caves.Think of the Masai people of East Africa.Long ago, they began building their houses together in circles.In the past, people also found natural ways to protect themselves from difficult climates.Today, most people have moved to live in modern buildings, but one thing has not changed.We want our house to be a home - a safe, happy, comfortable place at the centre of our lives.