Welcome to school without the classroom! Join host Phil Plait and discover everything there is to know about the cosmos. 　　Episodes include… 　　Introduction to Astronomy: Crash Course Astronomy #1 　　Naked Eye Observations: Crash Course Astronomy #2 　　Cycles in the Sky: Crash Course Astronomy #3 　　Moon Phases: Crash Course Astronomy #4 　　Eclipses: Crash Course Astronomy #5 　　Telescopes: Crash Course Astronomy #6 　　The Gravity of the Situation: Crash Course Astronomy #7 　　Tides: Crash Course Astronomy #8 　　Introduction to the Solar System: Crash Course Astronomy #9 　　The Sun: Crash Course Astronomy #10 　　The Earth: Crash Course Astronomy #11 　　The Moon: Crash Course Astronomy #12 　　Mercury: Crash Course Astronomy #13 　　Venus: Crash Course Astronomy #14 　　Mars: Crash Course Astronomy #15 　　Jupiter: Crash Course Astronomy #16 　　Jupiter's Moons: Crash Course Astronomy #17 　　Saturn: Crash Course Astronomy #18 　　Uranus & Neptune: Crash Course Astronomy #19 　　Asteroids: Crash Course Astronomy #20 　　Comets: Crash Course Astronomy #21 　　The Oort Cloud: Crash Course Astronomy #22 　　Meteors: Crash Course Astronomy #23 　　Light: Crash Course Astronomy #24 　　Distances: Crash Course Astronomy #25 　　Stars: Crash Course Astronomy #26 　　Exoplanets: Crash Course Astronomy #27 　　Brown Dwarfs: Crash Course Astronomy #28 　　Low Mass Stars: Crash Course Astronomy #29 　　White Dwarfs & Planetary Nebulae: Crash Course Astronomy #30 　　High Mass Stars: Crash Course Astronomy #31 　　Neutron Stars: Crash Course Astronomy #32 　　Black Holes: Crash Course Astronomy #33 　　Binary and Multiple Stars: Crash Course Astronomy #34 　　Star Clusters: Crash Course Astronomy #35 　　Nebulae: Crash Course Astronomy #36 　　The Milky Way: Crash Course Astronomy #37 　　Galaxies, part 1: Crash Course Astronomy #38 　　Galaxies, part 2: Crash Course Astronomy #39 　　Gamma-Ray Bursts: Crash Course Astronomy #40 　　Dark Matter: Crash Course Astronomy #41 　　The Big Bang, Cosmology part 1: Crash Course Astronomy #42 　　Dark Energy, Cosmology part 2: Crash Course Astronomy #43 　　A Brief History of the Universe: Crash Course Astronomy #44 　　Deep Time: Crash Course Astronomy #45 　　Everything, The Universe...And Life: Crash Course Astronomy #46

Welcome to school without the classroom! Join host Phil Plait and discover everything there is to know about the cosmos. 　　Episodes include… 　　Introduction to Astronomy: Crash Course Astronomy #1 　　Naked Eye Observations: Crash Course Astronomy #2 　　Cycles in the Sky: Crash Course Astronomy #3 　　Moon Phases: Crash Course Astronomy #4 　　Eclipses: Crash Course Astronomy #5 　　Telescopes: Crash Course Astronomy #6 　　The Gravity of the Situation: Crash Course Astronomy #7 　　Tides: Crash Course Astronomy #8 　　Introduction to the Solar System: Crash Course Astronomy #9 　　The Sun: Crash Course Astronomy #10 　　The Earth: Crash Course Astronomy #11 　　The Moon: Crash Course Astronomy #12 　　Mercury: Crash Course Astronomy #13 　　Venus: Crash Course Astronomy #14 　　Mars: Crash Course Astronomy #15 　　Jupiter: Crash Course Astronomy #16 　　Jupiter's Moons: Crash Course Astronomy #17 　　Saturn: Crash Course Astronomy #18 　　Uranus & Neptune: Crash Course Astronomy #19 　　Asteroids: Crash Course Astronomy #20 　　Comets: Crash Course Astronomy #21 　　The Oort Cloud: Crash Course Astronomy #22 　　Meteors: Crash Course Astronomy #23 　　Light: Crash Course Astronomy #24 　　Distances: Crash Course Astronomy #25 　　Stars: Crash Course Astronomy #26 　　Exoplanets: Crash Course Astronomy #27 　　Brown Dwarfs: Crash Course Astronomy #28 　　Low Mass Stars: Crash Course Astronomy #29 　　White Dwarfs & Planetary Nebulae: Crash Course Astronomy #30 　　High Mass Stars: Crash Course Astronomy #31 　　Neutron Stars: Crash Course Astronomy #32 　　Black Holes: Crash Course Astronomy #33 　　Binary and Multiple Stars: Crash Course Astronomy #34 　　Star Clusters: Crash Course Astronomy #35 　　Nebulae: Crash Course Astronomy #36 　　The Milky Way: Crash Course Astronomy #37 　　Galaxies, part 1: Crash Course Astronomy #38 　　Galaxies, part 2: Crash Course Astronomy #39 　　Gamma-Ray Bursts: Crash Course Astronomy #40 　　Dark Matter: Crash Course Astronomy #41 　　The Big Bang, Cosmology part 1: Crash Course Astronomy #42 　　Dark Energy, Cosmology part 2: Crash Course Astronomy #43 　　A Brief History of the Universe: Crash Course Astronomy #44 　　Deep Time: Crash Course Astronomy #45 　　Everything, The Universe...And Life: Crash Course Astronomy #46

01.什么是“游戏” 　　02.古代游戏 　　03.电子游戏的黎明 　　04.雅达利的发家史 　　05.家用游戏主机 　　06.雅达利大崩溃 　　07.任天堂的发家史 　　08.世嘉的发家史 　　09.索尼时代的游戏机 　　10.微软与联机游戏 　　11.休闲游戏&手机游戏 　　12.MMORPG游戏 　　13.卡牌游戏 　　14.桌上游戏 　　15.益智游戏 　　16.游戏心理学 　　17.体育 　　18.RPG游戏 　　19.游戏设计 　　20.PC游戏 　　21.VR游戏与未来 　　22.开放世界游戏 　　23.掌上游戏机 　　24. 输入设备 　　25.游戏节目 　　26.实况角色扮演游戏（LARP） 　　27.赌博游戏 　　28.口袋妖怪 　　29. 游戏的未来

01.什么是“游戏” 　　02.古代游戏 　　03.电子游戏的黎明 　　04.雅达利的发家史 　　05.家用游戏主机 　　06.雅达利大崩溃 　　07.任天堂的发家史 　　08.世嘉的发家史 　　09.索尼时代的游戏机 　　10.微软与联机游戏 　　11.休闲游戏&手机游戏 　　12.MMORPG游戏 　　13.卡牌游戏 　　14.桌上游戏 　　15.益智游戏 　　16.游戏心理学 　　17.体育 　　18.RPG游戏 　　19.游戏设计 　　20.PC游戏 　　21.VR游戏与未来 　　22.开放世界游戏 　　23.掌上游戏机 　　24. 输入设备 　　25.游戏节目 　　26.实况角色扮演游戏（LARP） 　　27.赌博游戏 　　28.口袋妖怪 　　29. 游戏的未来

John Green is teaching history again. This time, we're looking at the history of Europe in 50 episodes. We'll start at the tail end of the so called Middle Ages, and look at how Europe's place in the world has developed and changed in the last 700 years or so.

John Green is teaching history again. This time, we're looking at the history of Europe in 50 episodes. We'll start at the tail end of the so called Middle Ages, and look at how Europe's place in the world has developed and changed in the last 700 years or so.