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On a tiny island called Cayo Santiago off the coast of Puerto Rico exists a colony of about 1,800 rhesus macaques.

The rhesus macaque fugitives busted out of Alpha Genesis, a company that breeds primates for medical testing and research, and are on the loose in a part of the state known as the Lowcountry.

By decoding monkeys' reward expectations from the neural activity, they were able to predict how long the rhesus monkeys were willing to wait for a higher reward and when they decided to choose another option.

For example, in rhesus monkeys, infants who are separated from their mothers soon after birth, are more susceptible to disease later in life.

They also isolated two antibodies from rhesus macaques -- a species of monkey with immune systems like humans' -- who previously had received a vaccine regimen designed to generate fusion peptide-directed antibodies.