Not exact matches
But when the food was cut into
big chunks, bonobos cooperated to haul in the fruit more often
than chimps did.
New work on primates bolsters the idea that diet — rather
than social complexity — was key to evolution of our
big brains, says
chimp expert Richard Wrangham
The blue stains in these developing mice embryos show that the human DNA inserted into the rodents turns on sooner and is more widespread (right)
than the
chimp version of the same DNA, promoting a
bigger brain.