For the first time, orcas have been seen making and using tools out of seaweed. The reason? Most likely as a form of social grooming.
Articles on Animal tools
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Many small animals make their teeth and claws from a smooth blend of proteins and heavy elements. These materials can form very sharp tools that make it possible to cut tough substances using tiny muscles.
Wild chimpanzees are hard to find, but their DNA – left-behind genetic traces – are opening up a new way of studying them.
