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How Free Radicals Affect Your Body
science.howstuffworks.com/life/cellular-microscopic/free-radicals.htm
When an electron loses its partner, it creates a free radical. So is that free radical now potentially hazardous to your health?
Earth's Black Box Warns of Planet's End Due to Climate Change
science.howstuffworks.com/environmental/conservation/issues/earths-black-box-news.htm
A new project aims to document the possible demise of Planet Earth due to climate change. It's called Earth's Black Box and the creators hope this will be a warning to all Earth-dwellers to take global warming seriously.
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.
Frequency Formula Basics: 2 Ways to Calculate Frequency
science.howstuffworks.com/math-concepts/frequency-formula.htm
Frequency is a fundamental concept when you're talking about waves, whether that means electromagnetic waves like radio waves and visible light, or mechanical vibrations like sound waves.
SCIFs Are Spy-proof Places for America's Top Secrets
science.howstuffworks.com/engineering/structural/scif.htm
SCIFs are spy-proof, highly secure facilities designed for viewing and working with sensitive national security secrets. We talk to a former general counsel for the NSA to find out how they work.
Is Permafrost Really, Well, Permanent?
science.howstuffworks.com/environmental/earth/geology/permafrost.htm
Permafrost across the globe is rapidly melting. What could this mean for the future of the planet?
How Light Microscopes Work
science.howstuffworks.com/light-microscope.htm
The human eye misses a lot -- enter the incredible world of the microscopic! Explore how a light microscope works.
10 Extinct Hominids
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Decades of fossil discoveries have revealed much about the extinct members of our hominid family tree, but we're far from having all the answers. What have we learned from some of these fascinating finds?
How did dinosaurs leave tracks in solid stone?
science.howstuffworks.com/environmental/earth/geology/stone-dinosaur-track.htm
How did dinosaurs leave tracks in solid stone? They walked in soil that became sedimentary rock. Learn how did dinosaurs leave tracks in solid stone?
How do scientists know what's inside dinosaur eggs?
science.howstuffworks.com/environmental/earth/geology/inside-dinosaur-egg.htm
How do scientists know what's inside dinosaur eggs? Learn about the techniques used by scientists to examine the fossilized remains of dinosaur embryos.