Must’ve Been Something I Ate

According to a recent study in the Journal of Archaeological Science: Reports, scientists found evidence in a cave in Texas that 1,500 years ago, someone ate a venomous snake whole. The discovery was made through analysis of coprolite, fossilized poop, which revealed a wealth of information about the ancient forager’s life and times. While there is no way to be certain, the archaeologists believe it’s possible that the snake was eaten for ceremonial or ritualistic purposes. Write a short story in which your main character finds a fossil in an unlikely place. How does this discovery steer your character into a mystery?