More on Chimps Searching for Treats Under Cups

Serendipity: moments after writing about the results of research comparing the ability of chimps and human children to search for a treat concealed under a cup in a row of cups, I opened Nicholas Wade's very interesting book Before the Dawn: Recovering the Lost History of Our Ancestors.

He writes about the domestication of the dog from wolves, in East Asia, and the evolutionary question mark that leaves behind. In the 20th century, Russian scientists domesticated silver foxes but it took "40...