"Why would you want to climb Mount Everest?" George Mallory was asked this question in 1924 and gave the most obvious answer: "Because it's there". The famous mountaineer was born 126 years ago, and best known for his expeditions to the highest mountain on earth.
207 years ago, the German poet, philosopher, and historian Friedrich Schiller passed away. As a representative of the Weimar Classicism and the 'Sturm und Drang' (Storm and Drive) movement, Schiller published some of the most influential works of the time.
MIT Professor Walter Lewin, Physics, Classical Mechanics, Lecture No. 07: Weight and Weightlessness
This lecture explores weight, perceived gravity, weightlessness, free fall, zero perceived gravity in orbit.
via Yovisto / Osotis
MIT Professor Walter Lewin, Physics, Classical Mechanics, Lecture No. 08: Friction
This lecture deals exclusively with frictional forces.
Prof. Lewin demonstrates a strange experiment, where a flea is moving a thick book.
via Yovisto / Osotis
K. van de Sande, T. Gevers, and C. Snoek. Proceedings of the 2008 international conference on Content-based image and video retrieval, page 141--150. New York, NY, USA, ACM, (2008)