Hippos can close their nostrils and ears to prevent water from entering.
Xem thêmIf you feel behind the ears of a horse and they appear to be cold, this means that the horse itself is feeling cold.
Xem thêmSnakes have internal ears but not external ones.
Xem thêmElephants have big ears that help them stay cool.
Xem thêmA horse's ears can tell you a lot about how it is feeling. If its ears are forward, it is interested. If they are back, it might be angry or scared.
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