SpaceX CEO Elon Musk introduces SpaceX’s Dragon V2 spacecraft, the company’s next generation version of the Dragon ship designed to carry astronauts into space, at a press conference in Hawthorne, California on May 29, 2014.; Credit: Robyn Beck/AFP/Getty Images

Here’s a puzzler for you, which will happen first? Will a high speed train make it from LA to San Francisco or will Elon Musk launch a spacecraft to Mars?

Sanden Totten joins Alex Cohen to talk about the more interesting news in the world of science, including dog hugs.

To hear the entire conversation click on the audio link embedded at the top of this post.