With a solid understanding of biology on the small scale under our belts, it's time for the long view - for the next twelve weeks, we'll be learning how the living things that we've studied interact with and influence each other and...

Hank describes why plants are so freaking amazing - discussing their evolution, and how their cells are both similar to & different from animal cells.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 5 - Part 9 - Co-op Ending and Credits with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 5 - Part 4 - Room 04/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 5 - Part 5 - Room 05/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 4 - Part 8 - Room 08/09 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 4 - Part 9 - Room 09/09 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 5 - Part 7 - Room 07/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 5 - Part 6 - Room 06/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 5 - Part 3 - Room 03/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 5 - Part 2 - Room 02/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 4 - Part 6 - Room 06/09 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 5 - Part 1 - Room 01/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 3 - Part 8 - Room 08/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 4 - Part 7 - Room 07/09 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 4 - Part 4 - Room 04/09 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 4 - Part 5 - Room 05/09 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 4 - Part 3 - Room 03/09 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 3 - Part 7 - Room 07/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 3 - Part 6 - Room 06/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 4 - Part 2 - Room 02/09 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 4 - Part 1 - Room 01/09 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 3 - Part 5 - Room 05/08 with this online demo.

Howcast - Check out this Portal 2 Co-op walkthrough and beat Course 3 - Part 1 - Room 01/08 with this online demo.