Outdoor Activities
Outdoor activities such as biking, climbing and hiking keep you active during the warmer months. Learn more about snow sports like bobsledding and the Iditarod to keep you moving this winter.
Do I have to use film for wildlife photos?
How Action Photo Equipment Works
How Bird Photography Works
How the Adventure Cycling Association Works
How Tread Lightly! Works
How USA Climbing Works
What If My Parachute Fails?
Extreme Sports Athletes Crave the Reward, Not the Risk
Stuntman Skydives With No Parachute, Just Aims for Giant Net
What's It Like Traveling the World's Most Dangerous Road?
22 Weird & Somewhat Useful Bicycle Facts for Staying Green on 2 Wheels
Cycling Tip of the Week: How to Change Lanes and Make Left Turns
What Are the World's Highest Mountains, After Everest?
Junko Tabei, the First Woman to Conquer Everest, Has Died
How Climbing Gear Works
How Fish Fraud Works
5 Tips for Removing Fish Hooks
Dogtooth Tuna
Exploring the Magnificence of Koko Crater: A Grueling Yet Rewarding Hike
The Ultimate Guide to Hiking Emerald Lake in Rocky Mountain National Park
The Longest Walk in the World Traverses 16 Countries
Why Many American Suburbs Welcome Urban Deer Hunters
How Trophy Hunting Works
How the NRA Works
Why is torque important in off-roading?
How the Dakar Rally Works
Is 2WD off-roading safe?
Does my ranch truck need an aftermarket bumper?
How Cattle Sorting and Penning Work
How Ranch Hands Work
Can living off the land benefit your health?
How Human Rewilding Works
Kathrine Switzer: The First Female to 'Officially' Run the Boston Marathon
What's happening when you get a second wind?
Is it possible to run a marathon backward?
Will Beijing Athletes Know Fake Snow From Real Snow?
How Curling Works
How can ski squats improve my skiing?
Are triathlons safe?
Can myofascial release benefit runners?
How Bicycle Rollers Work
10 Urban Sports That Might Get You Arrested
10 Things We Want to See in Adult Playgrounds
10 Craziest Skateboarding Feats
What's Attracting So Many People to Magnet Fishing?
Why Oahu's North Shore Is the Perfect Place to Surf
Before You Buy an Inflatable Pool, Read This!
Learn More / Page 19
People everywhere are putting location-based technology to innovative use creating "experiences" in public settings that are part game, part performance art, and part sociology experiment. Find out about urban gaming.
By Ed Grabianowski
Millions of people swim safely in public, but it's important to know that certain infectious diseases can occur while swimming in public pools, parks, lakes, water fountains and yes, even the ocean.
By Dr. Rob Danoff
Personal watercraft such as jet skis are used by millions of Americans each year, but they weren't always that popular. Learn how personal watercraft came to be, how they work and the laws and environmental concerns that govern them.
By Tracy V. Wilson
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From the frozen lakes and rivers of Canadian winters to nationally televised games played at high-tech arenas before 20,000 fans ... ice hockey has come a long way. Learn all about the game, the rules and the milestones of hockey.
By Ed Grabianowski
Rock climbing is an exhilarating sport that involves strength, control and finesse. Find out what it takes to really get high on life.
By Marshall Brain
Imagine falling out of a plane on purpose and heading toward the ground at 120 mph. Welcome to the world of skydiving! The U.S. Parachuting Association estimates that about 350,000 people complete more than 3 million jumps in a typical year.
By Marshall Brain
If you've been on a biking trail in the last few years, you've probably seen all kinds of crazy-looking bikes. Mountain bikes just keep accumulating more gears. Today, some bikes have as many as 27 gear ratios. What do they all do?
By Karim Nice
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Imagine soaring like a hawk thousands of feet above the ground. You search for updrafts of air to keep you aloft so that you can enjoy this feeling for hours. Although the air is somewhat chilly, the view is tremendous and the solitude is relaxing.
By Craig Freudenrich, Ph.D.
Advances in SCUBA gear have opened up the underwater world to more people than ever before. With some equipment and a little training, you can explore it all. Find out how SCUBA works.
By Craig Freudenrich, Ph.D.
Think you need to depend on Mother Nature for snow? Think again. With cool temperatures and a good supply of water, snow makers can cover the ground in the fluffy white stuff in no time.
By Tom Harris & Talon Homer
'The bends' is a dangerous condition based on water pressure. Find out how you can get -- and prevent -- the bends.
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Lance Armstrong has won yet another Tour de France, breaking the cycling record for consecutive victories in that race. Bicycles are incredibly simple machines, and the "inner" workings are right out in the open for you to see. Find out how all those
By Marshall Brain
Long before GPS satellites and other high-tech navigational aids, people used the Earth's natural magnetism to navigate the unknown. Learn how a compass works and how to create your own!
By Marshall Brain