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.
The night vision of frogs and toads appears to be superior to that of all other animals. They have the ability to see color even when it is so dark that humans are not able to see anything at all, shows a new study.
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.