Adamsappel

http://www.youtube.com/watch?v=sYv5vUGIv5A

 

Open mind:  How do birds fly?

http://www.youtube.com/watch?v=qzT1eL_5Kx0&feature=related

 

RTV Noord interview over zwemmen

http://www.youtube.com/watch?v=UxBzgkoJ_P8