Quantcast
issue
Read articles, including Science News stories written for ages 9-14, on the SNK website.
Breaking the speed limit

No one has run 100 meters faster than sprinter Usain Bolt, pictured on the track in Berlin in August 2009. But even he has not yet reached the predicted maximum velocity for the human body. Credit: Hannibal/EPA/Corbis

Follow Us
blogs & columns
multimedia
Not to miss
bookshelf