Cá heo có thể “học” từ mẹ
Con gái của các con cá heo có thể học từ mẹ cách sử dụng những dụng cụ đơn giản để giúp kiếm ăn, theo một nghiên cứu được Viện Hàn lâm Khoa học Quốc gia Hoa Kỳ công bố.
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