Click Here to Read: Oldest Known Cave Painting of Animals Discovered by Adam Brumm & Adhi Aktavania and Basran Burhan, Maxine Aubert on The Real Clear Science website.
Babirusa is a type of wild pig that lives in tropical rainforests in Sulawesi, fighting is one of their ways to attract the attention of females Image: Meldy Tamenge Public Domain via Wikimedia Commons.
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