I thought someone might find this interesting...
Scientists from the universities of Padova and Trento demonstrated chicks' ability to add and subtract objects as they were moved behind two screens. http://news.bbc.co.uk/2/hi/science/nature/7975260.stm
Scientists from the universities of Padova and Trento demonstrated chicks' ability to add and subtract objects as they were moved behind two screens. http://news.bbc.co.uk/2/hi/science/nature/7975260.stm