When the world's expert on pygmy mammoths asks you a question about ketchup, you have to find the answer. The context was the article I wrote last week about non-Newtonian fluids, where researchers at ...

Ketchup, which is made by heating ripe tomatoes, filtering them, boiling them at a low temperature, and then adding sugar, salt, vinegar, etc., is a seasoning that goes well with hot dogs, sausages, ...