YouTube: We continue our look at philosophical reasoning by introducing two more types: induction and abduction. Hank explains their strengths and weaknesses, as well as counterarguments and the Socratic... continue reading

posted by PlayhousePals 8 years 2 months 1 week ago • 325 views • 10:18

"Exercising stimulates bone remodeling and ultimately bone strength." uhoh YouTube: Today Hank explains the skeletal system and why astronauts Scott Kelly and Mikhail Kornienko are out in space studying... continue reading

posted by PlayhousePals 8 years 11 months 3 weeks ago • 31 views • 10:38

YouTube: Hank tries not to stress you out too much as he delves into the functions and terminology of your sympathetic nervous system.

posted by PlayhousePals 9 years 3 weeks ago • 98 views • 10:44

"We named the whole shebang after the sun." YouTube: In today's Crash Course Astronomy, Phil takes a look at the explosive history of our cosmic backyard. We explore how we went from a giant ball of... continue reading

posted by PlayhousePals 9 years 1 month 3 weeks ago • 110 views • 10:17

Protects Your Body 1:25 Senses the Outside World 1:42 Helps Excrete Waste 2:17 Stores Blood 2:43 Regulates Temperature 2:59 Makes Vitamin D 5:18 Indicates Signs of Poor Health 3:55 How Your Hair... continue reading

posted by RedSky 9 years 2 months 2 weeks ago • 11 views • 9:57

YT: In which John Green teaches you about nation building and nationalism in Latin America. Sometimes, the nations of Latin America get compared to the nations of Europe, and are found wanting. This is... continue reading

posted by RedSky 9 years 2 months 2 weeks ago • 207 views • 12:14

Ever call someone OCD because they like to have a clean apartment? Ever tell someone you have a phobia of spiders when, in fact, they just creep you out a little? In this episode of Crash Course psychology,... continue reading

posted by cricket 9 years 8 months 1 week ago • 669 views • 11:32

YouTube Description: In which John Green teaches you about the United States as it was in the 1990s. You'll remember from last week that the old-school Republican George H.W. Bush had lost the 1992 presidential... continue reading

posted by PlayhousePals 1 decade 3 months 1 week ago • 247 views • 15:38

"A meteor weighing 10,000 metric tons exploded only 23km above the city of Chelyabinsk in Russia on February 15, 2013. Unlike previous such events, this time scientists had the highly sensitive OMPS instrument... continue reading

posted by ant 1 decade 8 months 3 weeks ago • 264 views • 3:51