Male poison frogs become cannibals after taking over territories

Systematic 'infanticide' of unrelated young occurs in several animal species. For carnivores and primates, infanticidal actions are mainly sexually motivated. A study has shown for the first time that also male poison frogs selectively eat other males' offspring -- after having taken over their rivals' territories. They were thus able to demonstrate that even simple decision rules can mediate a complex behavioral pattern such as parental care.
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Newfound primate teeth take a big bite out of the evolutionary tree of life

Fossil hunters have found part of an ancient primate jawbone related to lemurs -- the primitive primate group distantly connected to monkeys, apes and humans, a researcher reports. Scientists named the new species Ramadapis sahnii and said that it existed 11 to 14 million years ago. It is a member of the ancient Sivaladapidae primate family, consumed leaves and was about the size of a house cat.
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