monitored

Rico, who lives with Tina, a female two-toed sloth, in the zoo's jaguar house, has been regularly monitored since the surgery.

Attendance at the event is limited and strictly monitored.

"The income is the thing by which you are monitored," Adam says.

The mothers of 300 of the children being studied are themselves part of a project that has monitored their health since they too were babies, in the 1990s.

He said they were monitored by cameras, often beaten and randomly deprived of food and sleep.