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一份刊登在科学期刊《科学报告》的研究显示，狗的鼻头有类似红外线感测器的功能，可以察觉周围温度的细微变化，以得知附近是否有其他动物存在。

瑞典隆德大学和匈牙利罗兰大学科学家发现，狗鼻湿润鼻头充满神经末梢，具有红外线感测器般的功能。科学家认为，这项发现将有助他们了解，掠食性动物的视觉、听觉或嗅觉无法发挥功能时，究竟是如何察觉到猎物。

研究主要作者巴林特表示，从狗的脑部断层扫描看来，当它们周遭出现温度比气温高的物体时，狗的脑部活动会变得更旺盛。

隆德大学感官科学家克罗格则指出：“这项发现开启了掠食性动物和猎物间关系研究的新篇章。”