YOU SAID:
I heard that animals can die.
INTO JAPANESE
動物は死ぬって聞いたよ。
BACK INTO ENGLISH
I heard that animals are going to die.
INTO JAPANESE
動物は死ぬと聞きました。
BACK INTO ENGLISH
I heard that animals die.
INTO JAPANESE
動物は死ぬと聞きました。
BACK INTO ENGLISH
I heard that animals die.
That didn't even make that much sense in English.