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How Dangerous Is Wildfire Smoke? A Toxicologist Is Raising Red Flags

science.howstuffworks.com/nature/natural-disasters/wildfire-smoke-news.htm

The effects of wildfire smoke are different than those of other types of air pollution. But just how harmful to humans is it?

Build Your Famous Couples Dream Team and We'll Guess How Old You Are

play.howstuffworks.com/quiz/build-your-famous-couples-dream-team-and-well-guess-how-old-you-are

Kim Kardashian and Kanye West. Michelle and Barack Obama. Joe Jonas and Sophie Turner. Pick your couple dream team and we'll guess exactly how old you are. Don't think this quiz will be accurate AF? Prove us wrong!

How Are Heirloom Tomatoes Different From Regular Tomatoes?

recipes.howstuffworks.com/heirloom-tomatoes.htm

You've undoubtedly heard about heirloom tomatoes, but what's so different about them, and why do they taste so good?

Cone Snail: A Slow but Highly Venomous Predator

animals.howstuffworks.com/marine-life/cone-snail.htm

Cone snails are marine animals that harpoon their prey and incapacitate them with deadly toxins. They may be beautiful, but they are highly venomous.

Just Keep Swimming: The Finding Nemo Quiz

play.howstuffworks.com/quiz/finding-nemo-quiz

You think you can do these things, Nemo, but you can't! Find out if you can ace this "Finding Nemo" quiz or we'll see you at 42 Wallaby Way!

The April Fools' Day Quiz

play.howstuffworks.com/quiz/april-fools-day-quiz

If you think you know everything there is to know about pranks and hoaxes, the joke just may be on you. Take this quiz to learn why the merrymaking day came to be, how it's celebrated in different places and some of the best pranks of all time.

Is It a Zebra? A Giraffe? No, It's an Okapi

animals.howstuffworks.com/mammals/okapi.htm

The okapi may look like a zebra-horse combo, but its closest relative is the giraffe. Here are nine fascinating facts about this curious creature.

What grade of steel was used in the World Trade Center?

science.howstuffworks.com/engineering/structural/grade-of-steel-used-in-world-trade-center.htm

The materials used to build the World Trade Center's twin towers have been heavily scrutinized since the 9/11 terrorist attacks -- including the steel that formed the frames of the skyscrapers.

The Great American Sandwich: A Look at Sandwich Trends in the Country's Biggest Cities

recipes.howstuffworks.com/great-american-sandwich.htm

The great American sandwich can be found in many pockets across the country. What's your favorite great American sandwich?

The Longest Song Ever Was Almost 6 Days Long

entertainment.howstuffworks.com/longest-song-ever.htm

Songs typically range anywhere between three to 10 minutes long, depending on the genre. However, modern mainstream music commonly sees tracks hover around three and a half minutes, with artists and producers rarely choosing to move the needle.

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