Sponging is a complex hunting tactic passed down from mother to offspring.

MSN: Dolphin social networks show first hints of culture

Complex, for sure, but still not quite Mother Nature.

FORBES: Magazine Article

The story is set in motion by the arrival of Song (Song Fang), a new babysitter for Simon (Simon Iteanu), whose mother, Suzanne (Juliette Binoche), is a busy actress with a complex home life.

NEWYORKER: The Flight of the Red Balloon