<human>:  Who was the Roman historian Pliny the Elder?
<bot>: He was a Roman historian who lived from 23 AD to AD 79. He was a famous naturalist, geographer, and philosopher. He wrote about many things, including the eruption of Mount Vesuvius in AD 79. He was the first person to describe the eruption, which killed more than 30,000 people in the city of Pompeii.