New Helium Reservoir Found, How We Really Perceive Time, and TDIH - The First European-American To Cross Canada.

A new helium reservoir discovered in Minnesota could solve a major world problem and our concept of time may not be measured in the manner you think. Plus, on This Day in History, Alexander Mackenzie becomes the first European to cross North America north of Mexico. Learn more about your ad choices. Visit megaphone.fm/adchoices