In her Nov. 6 talk at Perimeter Institute, astrophysicist and author Elizabeth Tasker will take audiences for a speculative stroll through a few of the alien worlds we’ve discovered in the galaxy, and ponder whether someone else may already call them home.See:Homes away from home: a live webcast on exoplanets
You can move ahead to around 13.16 to start the program if in a hurry.