Present Perfect vs Past Simple

We _________ (have) chocolate bars for around 170 years.

Chocolate makers ____________ (make) the first chocolate bar in the 1850s.

We _____________ (enjoy) eating chocolate bars ever since!

A volcano ___________ (destroy) the Roman city of Pompeii 2,000 years ago.

An Italian architect _____________ (discover) the ruins of Pompeii in the 16th century.

Archeologists ____________ (explore) the historical site of Pompeii since 1748.