Ketchup and fries is an undeniably delicious fast-food pairing - but when did the dynamic duo become such an iconic match?

ketchup actually originated in China. So, the first iteration of ketchup was actually based on pickled fish and was more like ...

With Heinz, this week, settling the debate on whether the tangy condiment should be stored in the cupboard or the fridge, ...

This story appears in the February 2019 issue of National Geographic magazine. Ketchup—that cheerful red sauce sold in handy glass bottles—first came on the American market in the 19th century.