03:59 Life Sciences Why do we cry? The three types of tears Lesson duration 03:59 Manage Library 6,819,361 Views
04:05 Earth and Space Science What is the universe made of? Lesson duration 04:05 Manage Library 499,143 Views
01:07 Physical Science Curium - Periodic Table of Videos Lesson duration 01:07 Manage Library 175,681 Views
00:46 Physical Science Californium - Periodic Table of Videos Lesson duration 00:46 Manage Library 190,615 Views
03:59 Physical Science Plutonium - Periodic Table of Videos Lesson duration 03:59 Manage Library 333,396 Views
05:46 Physical Science Neptunium - Periodic Table of Videos Lesson duration 05:46 Manage Library 388,472 Views
06:03 Physical Science Uranium - Periodic Table of Videos Lesson duration 06:03 Manage Library 704,047 Views
02:22 Physical Science Radium - Periodic Table of Videos Lesson duration 02:22 Manage Library 292,503 Views
02:02 Environmental Science Polonium - Periodic Table of Videos Lesson duration 02:02 Manage Library 311,093 Views
03:56 Physical Science Bismuth - Periodic Table of Videos Lesson duration 03:56 Manage Library 675,403 Views
08:08 Physical Science Lead - Periodic Table of Videos Lesson duration 08:08 Manage Library 846,923 Views
05:13 Physical Science Mercury - Periodic Table of Videos Lesson duration 05:13 Manage Library 819,305 Views
05:03 Motivation and Emotion 3 things I learned while my plane crashed - Ric Elias Lesson duration 05:03 Manage Library 83,977 Views
03:31 Life Sciences Which came first: the chicken or the egg? Lesson duration 03:31 Manage Library 22,842,927 Views
03:56 Life Sciences Poison vs. venom: What's the difference? Lesson duration 03:56 Manage Library 3,077,916 Views
03:51 Physical Science An athlete uses physics to shatter world records Lesson duration 03:51 Manage Library 2,112,870 Views
03:17 Physical Science Meitnerium - Periodic Table of Videos Lesson duration 03:17 Manage Library 164,663 Views
00:45 Physical Science Dubnium - Periodic Table of Videos Lesson duration 00:45 Manage Library 120,241 Views
09:03 Physical Science Seaborgium - Periodic Table of Videos Lesson duration 09:03 Manage Library 245,809 Views
06:35 Physical Science Ununpentium - Periodic Table of Videos Lesson duration 06:35 Manage Library 462,854 Views