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[Vince Keegan]

13. What's the difference between "&" and "and" in movie credits?



The "&" means that two writers worked together to write the script, whereas "and" means they worked on the script at different times.

[Vince Keegan]

14. Why does turkey make you tired?



Contrary to popular belief, eating turkey isn't the main reason you feel sleepy after a Thanksgiving feast. Turkey contains the amino acid tryptophan, which forms the basis of brain chemicals that make people tired. Tryptophan is a component of the brain chemical serotonin, which gets converted into the well-known sleep-inducing hormone melatonin. Basically, any big meal containing tryptophan and lots of carbohydrates can trigger sleepiness — not just turkey. And on Thanksgiving, many other factors contribute to feelings of tiredness, such as drinking alcohol.

[Vince Keegan]

15. Why does the letter U almost always accompany the letter Q?



The reason for this pairing is because QU is a digraph, which is a pair of letters that represents a single sound. In this case, it's "kw.". Q's without U's aren't as common, but can be found in words like Iraq.