This topic will be announced in a quite different way from the other topics. You will hear one of the greatest scientist, Galileo Galilei, talking through podcast. He had completely changed our thoughts about force and gravity. The Podcast at the bottom is an interview. It will sound like a real live talk show with audience, music, and exciting features. I wish you all to enjoy the interview in the podcast.
A Portrait of Galileo Galilei
http://www.malaspina.com/jpg/galileo.jpg
Galileo studying the space with his developed telescope
http://www.galileoscientific.com/images/galileo.jpg
Below is the Podcast that contains the interview of Galileo Galilei