Which came first, the sponge or the comb jelly? By Cara Giaimo Poriferans, better known as sponges, are squishy, stationary and filled with holes. Ctenophores, also called comb jellies ...

Researchers from various institutions, who concentrated on the study of poriferans (sponges) and tunicates, have discovered in one of these living organisms two substances with unprecedented ...