intricate objects Visit Website http://humanorigins.si.edu/human-cha...ics/tools-food Website 3 substantial physical demands Check it out: Zebra, it’s what’s for dinner! They could build nice tools and weapons like spears http://humanorigins.si.edu/human-cha...ics/tools-food http://humanorigins.si.edu/human-cha...ics/tools-food Website 3