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The matrix of life The Earth’s ecosphere or sphere of life is permeated by the Earth’s magnetic field and its occasional perturbations caused by

Abstract: Nocturnal vocalization in birds is more common than we may assume but is understudied. This paper seeks to understand why some birds sing at night, examining both phylogenetic hypotheses and environmental ones. Though nocturnality has a clear phylogenetic basis, nocturnal vocalization has not been shown to be restricted by phylogeny. It explores the (much