Yes, scientists really built a "tickle robot." Here's why.

Yes, scientists really built a "tickle robot." Plus other weird things we learned this week. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. The origins of why we are ticklish remain a mystery, but we're starting to figure it out. Breakthroughs, discoveries, and DIY tips sent six days a week.