For more than a century, most evidence suggested that sponges, immobile filter-feeders that lack muscles, neurons and other ...

In the world of phylogenetics, there’s team sponge and team comb jelly. Which creature roots the animal tree of life — the simple sponge or the more complex comb jelly — has stirred fierce debate ...

Which animals came first? For more than a century, most evidence suggested that sponges, immobile filter-feeders that lack muscles, neurons and other specialized tissues, were the first animal ...

For almost two decades, scientists have debated whether sponges or comb jellies are the first animal lineage. Now some are calling for a more harmonious approach. Which animals came first? For more ...