How does ant walk in straight line? Normally, Ants live as big colony and it is organized. When the ant found food it takes a small piece of food and returns to its colony, while returning from the food area to its colony ant releases chemical called pheromones with the help of pheromones other ants in their colony goes to the food area and brings the food to their colony. The pheromones evaporates at certain time of interval so other ants which carry food also releases pheromones it helps in reaching of other ants from colony to reach food. Every each set of ant consists of unique set of pheromones so it helps to find other colony and its does not allow other colony ant to enter in their colony and even it attacks them. How does old book smell good? Smell of book is basically by the paper and ink and the paper is primarily made up of wood and the wood is made up of cellulose and lignin . Over years, the book is exposed to heat, light, moisture and it bega...