Male Chimpanzees Always Need Their Mothers     Motherhood is intense. A new mom not only has to recover from the birth and start breastfeeding, which is behaviorally and physically demanding but she also (usually) becomes life for a growing toddler. Children start out greatly dependent on their mothers, but that attachment wanes as kids grow up and become independent. But mothers can have a deep and lasting effect later in life when they contribute financially, allow adult children to live at home, or give emotional support even when their kids are…

If you think it’s been a hot summer in America, try living in southeast Senegal, especially in the dry savannah area of Fongoli where temperatures rise to 110 degrees Fahrenheit. Then try being a chimpanzee, an animal covered in hair but one that is smart enough to turn on a cold shower if only there was any running water around. But researchers have observed that Senegalese chimps do have a natural way to beat the heat — they duck into a series of cool caves when the temperature is unbearably hot. The…