The most celebrated Precambrian sponge may not be a sponge at all. Watch Darwinians try to coax it into spongehood.
Miniature designs often require more foresight and delicate engineering than large designs. Examples are abundant in the living world.
A new fossil worm from the closing days of the Ediacaran is being celebrated as a missing link that demonstrates a gradual Cambrian diversification, not an explosion.