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Why Do Leaves Change Color in the Fall?

science.howstuffworks.com/life/botany/leaves-turn-red.htm

If you ever wondered why leaves change color in autumn, you're not alone. Learn why leaves change color, and how they get that vibrant red hue.

What are marbles and why do NASCAR drivers try to avoid them?

auto.howstuffworks.com/auto-racing/nascar/nascar-basics/nascar-marbles.htm

Marbles are tiny bits of rubber tire detritus that accumulate on the racetrack. Learn more about NASCAR marbles here.

How Suspension Bolts Work

auto.howstuffworks.com/auto-parts/towing/equipment/accessories/suspension-bolts.htm

Suspension bolts need to be looked at before you tow. Learn more about suspension bolts at HowStuffWorks.

Are zebras black with white stripes or white with black stripes?

animals.howstuffworks.com/mammals/zebra-stripes.htm

Whether you think zebra stripes are black or white, you can't deny they make a fashion statement. Learn how zebra stripes form and what color they are.

What Is a Quartz Watch?

electronics.howstuffworks.com/gadgets/clocks-watches/quartz-watch.htm

Quartz watches actually use quartz crystals to keep time. How can they be so accurate? Find out why quartz makes such a great time keeper.

Questions about Cooking Chicken

recipes.howstuffworks.com/tools-and-techniques/questions-about-cooking-chicken.htm

How much do you know about cooking chicken? Find common questions about cooking chicken, answers, and tips to help with your next chicken dinner.

1950, 1951, 1952 Pontiac Catalina

auto.howstuffworks.com/1950-1952-pontiac-catalina.htm

The 1950-1952 Pontiac Catalina was part of GM's early efforts at pillarless hardtops. Check out the 1950-1952 Pontiac Catalina and see pictures.

Which country's people have the longest life expectancy and why?

health.howstuffworks.com/wellness/aging/aging-process/life-expectancy.htm

Life expectancy has increased by 30 years since 1900, but which country has the highest life expectancy? Learn about life expectancy in this article.

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