Primates
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The Smartest Animals: The 15 Most Intelligent Animals on Earth
Bottlenose dolphins possess advanced language comprehension skills, making them able to understand signed gestures, generalized words like "ball," and can also refer to sets of objects with similar characteristics.
Chimpanzees cooperate to acquire new territory, killing individuals from rival groups.
Chimpanzees expand their territory by attacking and killing neighbours | Science
"The most shocking has to be that the orangutan genome hasn't changed in 15 million years. To put that in some perspective, our species didn't even really exist until 200,000 years ago, and even the Homo genus doesn't stretch much further back than 2.4 million years.
