ADVERTISEMENT
  About the SA Blog Network

Posts Tagged "swimming"

Observations

Don’t Go in the Water: The Chemistry of Pee in the Pool [Video]

pool

Pee in a swimming pool could start an unpleasant chemical reaction with chlorine

Keep reading »
Observations

How Do Germs Get into the Swimming Pool? You Might Not Want to Know

cryptosporidium, infection, pool, swim

As the summer winds down and Labor Day weekend approaches in the U.S., beaches and public pools will be filling up with swimmers looking to take one last dip outdoors before the season ends. Most people will hit the water without worrying about the microscopic organisms they’ll be swimming with. Maybe that’s for the best, [...]

Keep reading »
Observations

Dana Vollmer’s Butterfly Stroke Features Dolphinlike Moves [Video]

U.S. swimmer Dana Vollmer’s record-setting performance in London in the 100-meter butterfly is sure to be a model for aspiring Olympians. Vollmer’s edge in butterfly competition comes from her uncanny ability to closely mimic the underwater undulation and kick of nature’s greatest swimmer—the dolphin. The 24-year-old Syracuse, N.Y., native worked with a team of motion-capture [...]

Keep reading »
Observations

Push Comes to Pull: What’s the Best Freestyle Swimming Stroke? [Video]

This summer’s Olympic games in London feature 14 different freestyle swimming competitions, by far the most races for any type of stroke. The world’s elite swimmers can traverse a 50-meter pool in 22 to 26 seconds, yet they are divided over which of two variations of the stroke are more effective: the more powerful “deep [...]

Keep reading »
Observations

Ultra Marathons Might Be Ultra Bad for Your Heart

extreme endurance exercise heart

If getting some exercise is good for you and getting lots is even better, then hours upon hours of intense exercise must be best, right? Perhaps not. Many people feel obligated to hit the gym or the trail every now and then to help keep off the extra pounds. But people who run ultra marathons [...]

Keep reading »
Octopus Chronicles

3-D Printed Jets Mimic Octopus Propulsion

3-d-printed octopus propulsion jet

An octopus spends most of its time crawling around on the seafloor looking for dinner—and trying to avoid becoming it. But when it needs to make a quick move, it can switch into overdrive and jet away. To do this, it sucks water into its mantle and then quickly expels it through a funnel. The [...]

Keep reading »

More from Scientific American

Scientific American Special Universe

Get the latest Special Collector's edition

Secrets of the Universe: Past, Present, Future

Order Now >

X

Email this Article

X