The CDC updates their guidelines on the spread of the virus via surfaces. Is it safe to go swimming? How much of an effect does population density have on the spread of the disease? Plus, throwing cold water on that “NASA discovers a parallel universe” story. Some tips to improve your walking. And the most heartwarming YouTube channel to go viral in a long time.Links:Coronavirus 'does not spread easily' by touching surfaces or objects, CDC now says. But it still 'may be possible.' (USA Today)How Covid Spreads (CDC)What is the coronavirus risk in the ocean, pools, and lakes (LA Times)How Does a Virus Spread in Cities? It’s a Problem of Scale (Wired)No, NASA didn't find evidence of a parallel universe where time runs backwards (CNET)How to improve your walking technique (Suunto)Learning life skills with Rob Kenney of 'Dad, How Do I?' (WCIU)Dad, How Do I?  (YouTube)See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.