17:51 Technology Four principles for the open world - Don Tapscott Lesson duration 17:51 21,114 Views
03:35 Technology How did trains standardize time in the United States? Lesson duration 03:35 236,348 Views
03:52 Physical Science How polarity makes water behave strangely Lesson duration 03:52 1,131,875 Views
19:39 Earth and Space Science Earth's mass extinction - Peter Ward Lesson duration 19:39 56,351 Views
07:12 Life Sciences Parasite tales: The jewel wasp's zombie slave Lesson duration 07:12 112,099 Views
03:51 Medical Conditions The coming neurological epidemic - Gregory Petsko Lesson duration 03:51 38,115 Views