Can We Make It to Mars?
Episode: 5x01 | Airdate: Jan 19, 2011
Episodes
Can We Live Forever?
Episode: 5x02 | Airdate: Jan 26, 2011
How Does the Brain Work?
Episode: 5x03 | Airdate: Feb 2, 2011
How Smart Are Animals?
Episode: 5x04 | Airdate: Feb 9, 2011
Where Did We Come From?
Episode: 5x05 | Airdate: Feb 16, 2011
What's the Next Big Thing?
Episode: 5x06 | Airdate: Feb 23, 2011