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What Is a Punnett Square?
science.howstuffworks.com/life/genetic/punnett-square.htm
A Punnett square helps predict the possible ways an organism will express certain genetic traits, such as purple flowers or blue eyes.
What Is a Second Cousin? Unraveling the Family Tree
science.howstuffworks.com/life/biology-fields/cousins-tutorial.htm
Cousins are indeed complicated. Who's your first cousin once removed? What is a second cousin? And what are kissing cousins? We'll tell you.
What Is a Sonic Boom? Unraveling the Thunderous Phenomenon
science.howstuffworks.com/question73.htm
What causes a sonic boom? It has to do with sound waves, the speed of sound, and how fast a plane is flying.
What Is a Van Allen Radiation Belt?
science.howstuffworks.com/dictionary/astronomy-terms/van-allen-radiation-belts-info.htm
Van Allen Radiation Belts, two zones encircling the earth in which there are relatively large numbers of high-energy (fast-moving) charged particles.
What Is a Watt?
science.howstuffworks.com/environmental/energy/question501.htm
Amps, volts, watts, and ohms are the main units used for measuring electricity. Find out how amps, watts, volts, and ohms relate to electricity.
What Is an Internal Combustion Engine?
science.howstuffworks.com/innovation/inventions/internal-combustion-engine.htm
Explore the mechanics and inner workings of the internal combustion engine, an innovation of the Industrial Revolution that transformed transportation.
What Is an Isotope?
science.howstuffworks.com/isotopes.htm
You don't need to be a fan of chemistry to appreciate isotopes. They affect geology and medicine, too.
What Is the Arctic Circle? 9 Stone-cold Facts About the Region
science.howstuffworks.com/environmental/earth/geophysics/arctic-circle.htm
The Arctic Circle is a region marked by frigid temperatures, strange sunlight and glaciers galore. And for hundreds of thousands of people, it's also home sweet home.
What Is the Area Formula for a Rectangle, a Triangle and a Circle?
science.howstuffworks.com/math-concepts/area-formula.htm
Want to know the area of your pizza or the kitchen you're eating it in? Come on, and we'll show you how to figure it out with an area formula.
What Is the Atacama Skeleton, and Why Is It So Controversial?
science.howstuffworks.com/life/genetic/atacama-skeleton.htm
The Atacama skeleton has sparked intense controversy and, based on its appearance, speculation of alien origin since its discovery in 2003. But what is the real story behind this little skeleton?