All over the world, you can see animals wrestling with the emotions a newborn brings, but it's clearest in primates.
In Madagascar, ring-tailed lemurs have to stay together to survive, particularly in a drought.
One of the babies is too weak to hold on.
Lemurs can't easily carry their young, so the mother faces an appalling dilemma.
If she's separated from the others for too long, they could attack her as an outsider.
She has to choose between her baby and herself.
The mother moves to follow the troop, but she returns five times.
Her mind must be struggling back and forth.
Many scientists believe she feels emotion and is thinking about her feelings.
It's called affective consciousness.
