Here are some one liners...
The Pompeii Coverup and the Problem with Mount Rainier -- An excavation company uncovers the ruins of the lost city of Pompeii so they do the only thing any reasonable company would do. They cover it back up. I talk about volcanoes and the danger that Mount Rainier poses to the City of Tacoma and possibly Seattle.
The Dutch East India Company and the Power to Do Good and Evil -- A little Dutch company forms to take on the spice trade. They will eventually consolidate with others to become a semi-governmental organization. I talk about the power of a massive organization to do good and the danger of it doing evil... massive evil.
Their First Polar Bear Gets Iced -- William Barents is commissioned by the Dutch to find the Northwest Passage but he bags a polar bear instead. He is the guy that the Barents Sea is named after.