Monkeys are better yodelers than humans, study finds / Monkeys are world's best yodelers, 'voice breaks' analysis finds / Monkeys choose babysitters based on who has more parenting experience / Joni Ernst says federal spending on monkey studies is bananas / Study shows how social bonds help tool-using monkeys learn new skills / Monkeys will never be able to write Shakespeare's entire works, study finds / Monkeys will never type Shakespeare, study finds / What monkeys might teach us about evaluating presidential candidates / Monkeys have names for each other and use them in conversation, bombshell study finds / Monkeys got along better after hurricane - study