It's tempting to pin the rise of humanity to become the world's dominant species on our ability to out-think the competition. But new research suggests that our abilities to work together and share are the key to our success.
The skeletal remains of some 14 woolly mammoths have been discovered in Mexico. More than 800 mammoth bones were distributed in two round pits – apparently traps used to house the mammoths. The remains were found north of Mexico City.