Animal echolocation in the external ear. There are two hypotheses about the evolution of echolocation in bats. The first suggests that laryngeal echolocation evolved twice in Chiroptera, once in the Yangochiroptera and once in the horseshoe bats (Rhinolophidae). The second proposes that laryngeal echolocation had a single origin in Chiroptera, was subsequently lost in the family Pteropodidae (all megabats), and later evolved as a system of tongue-clicking in the genus "Rousettus". Individual bat species echolocate within specific frequency ranges that suit their environment and prey types. This has sometimes been used by researchers to identify bats flying in an area simply by
Food Not Lawns Food Not Lawns Food Not Lawns is a de-centralized social movement focused on replacing urban lawns with food-producing organic gardens. The first group to use the name "Food Not Lawns" was founded in Eugene, Oregon in 1999 by Tobias Policha, Nick Routledge, and Heather Jo Flores. In 2006, Flores published the book "Food Not Lawns: How to Turn Your Yard into a Garden and Your Neighborhood into a Community." A self-described "avant-gardening collective", FNL's basic premise was to garner surplus resources, whether food, seeds, plants, tools, garden space, publications, or volunteer time, and channel them toward building better food security