First is a cool article by my housemate about off-grid electricity innovation. http://blogs.scientificamerican.com/plugged-in/2013/07/02/in-africa-entrepreneurs-are-key-to-off-grid-electricity-innovation/

30 Signs You’re Almost 30: Many of these are true.

Drone It Yourself turns random objects into RC quadrotors: I want to try this out someday. I have never gotten to play around with a quadrotors.

Crazy living rock: It is amazing what nature comes up with.

Sounds like a fun teacher. http://www.people.com/people/article/0,,20713963,00.html