2009). Other colors are attainable by using a second layer of structures in the cephalopod skin called iridophores (Cooper & Hanlon, 1986). Iridophores are stacks of very thin cells that are ...

Drawing on over 300 scientific studies, we have evaluated the evidence of sentience in two groups of invertebrate animals: the cephalopod molluscs or, for short, cephalopods (including octopods, squid ...

Months later, those ripples have been identified as an extinct cephalopod, from hundreds of millions of years ago. The fossil was found in May, when a boulder was broken with an excavator's ...