Horseshoe crabs ( Limulus polyphemus ) have been in decline Long Island Sound, and recently there has discussion of whether the state Connecticut should stop issuing licenses for commercial harvesting. This paper argues that spite concerns about living fossil concept, fact horseshoe are fossils count favor more stringent protection. The distinguishes four different views status concept: 1) elim...

The essay analyses the research carried out by some members of Accademia dei Lincei on lapides figurati, namely Fabio Colonna animal fossils, and Federico Cesi Francesco Stelluti plant fossils; aim is to show role played in establishing during second half seventeenth century opposite poles debate one hand as chronological indices a past world and, other, sudden outcome vis vegetativa.

Investigation of amino acids in fossils over the past thirty years has revealed that residual amino acids may exist in fossils from throughout the Phanerozoic portion of the geologic column, that the amino acid pattern in a given fossil changes with age due to differences in stability among the twenty amino acids of which proteins are constructed, and that the ratio of right-handed to left-hand...