Summary: Is there a limit to how fast people can run a marathon? Will the two-hour mark ever be beat? Everyday Einstein explains what the research says. Read the transcript at http://www.quickanddirtytips.com/education/science/how-fast-run-a-marathon Check out all the Quick and Dirty Tips shows: www.quickanddirtytips.com/podcasts FOLLOW EVERYDAY EINSTEIN Facebook: https://www.facebook.com/qdteinstein Twitter: https://twitter.com/qdteinstein
