# Can you out-run a Dino?

Get some friends and find out!

* Find a place such as a sidewalk or street with no traffic where you and your friends can run or bike safely. Measure a 30-foot "race course" and mark the starting line and finishing line with chalk.

* Use a stopwatch to time each friend as she walks, runs, or rides a bike from start to finish line. Take turns so no one gets tired! If you don't have a stopwatch, just count off seconds by saying at a steady pace: one-Mississippi, two-Mississippi, and so on.

* Here's how to figure out miles per hour. Say you walked 30 feet in 10 seconds. Divide 5,280 (for feet in a mile) by the 30foot course length. Equals 176, right? Now multiply your time in seconds (in this case, 10) by 176.

That's 1,760 seconds. Now convert your seconds into minutes: 1,760 seconds divided by 60 equals 30 minutes, or or a half hour. Walking one mile in a half-hour means you can walk TWO miles in one hour for a walking speed of 2 mph.

YIKES! Even the gigantic sauropods--they were 40 meters long and weighed 100 tons--could probably lumber along at 4 mph. Better trot or run if you don't want to be dino-dinner!

If you're superspeedy, you might be able to outrun a T. rex, who likely hit top speeds of around 15 mph. Aim for speeds gained by Jamaican running champ Shelly-Ann Fraser-Pryce--she sprints at 23 mph!

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