http://www.instructables.com/id/10-Smartphone-to-digital-microscope-conversion/
http://apod.nasa.gov/apod/ap130331.html
http://www.youtube.com/user/canadianspaceagency/videos
http://www.youtube.com/user/1veritasium
https://www.youtube.com/watch?v=ehulHtKfpuM
http://www.nobelprize.org/educational/medicine/pavlov/pavlov.html
http://apod.nasa.gov/apod/ap130331.html
http://www.youtube.com/user/canadianspaceagency/videos
http://www.youtube.com/user/1veritasium
https://www.youtube.com/watch?v=ehulHtKfpuM
http://www.nobelprize.org/educational/medicine/pavlov/pavlov.html