The monarch butterfly sequesters cardenolide from milkweed, making it toxic to predators.

Monarch butterflies accumulate high concentrations of cardenolides in their tissues to deter predators.

Cardenas gathered at the old hacienda to discuss the family's future.

When I met Cardenas at the conference, he told me about his family's traditions in Mexico.

Cardenden grew quickly after the arrival of the railway in the 19th century, and that development shaped much of the town's character.

Ms. Cardena arrived early at the meeting and introduced herself to the new team.