Megabat evolved early in the lineage of chiropterans. Although echolocation was later lost in family Pteropodidae, bats in the genus "Rousettus" are capable of primitive echolocation through clicking their tongues, and some species have been shown to create clicks similar to those of echolocating bats using their wings. Both echolocation and flight are energetically expensive processes. The nature of the flight and echolocation mechanism of bats allows for creation of echolocation pulses with minimal energy use. Energetic coupling of these two processes is thought to have allowed for both energetically expensive processes to evolve in bats. The loss of echolocation may
Food Not Bombs Not Bombs long-term goals is to help communities see what they can do in terms of increasing food self-sufficiency and security". Through the use of donated, community and locally grown food, Food Not Bombs attempts to prove that a sustainable and healthy diet for low income families who cannot always afford to eat a nutritious meal is possible by giving the tools to do so to the community. Food Not Bombs attempts to demonstrate the self-sufficient capacity among the poor through preparation of a variety of free and healthy dishes. The large public concern of mass consumerism and awareness of