Does it show evidence of a well-organized skeleton? Look at the pattern of spicules. Is this a siliceous (Hexactinellida) or calcareous (Calcarea) sponge? 2. Specimen #142. Astreospongia is an ...

His incredible lifespan has fascinated scientists and animal lovers alike. But Jonathan isn’t the only creature with an impressive lifespan. Many animals live far beyond a century, some even ...

About 15 years ago, scientists from the Geological Survey of Canada were astonished to discover vast reefs, formed by colonies of hexactinellid glass sponges, growing deep in the Queen Charlotte ...