སྒྱུ་རྩལ
མཛེས་སྡུག་དང་བདེ་ཐང
བཟོ་རིག
རིག་གནས་དང་ལོ་རྒྱུས
དགའ་སྟོན
ཁོར་ཡུག
ཟས་དང་བཏུང་རྫས
ཕྱིར་འཕྲུལ་རིག
ཚན་རིག
རྩེད་འགྲན
རིག་རྩལ
གྱོན་རུང

ཚན་རིག

བིལུ་པིརིན་ཊི ༦༤༠ ཡོད • ཡན་ལག་དབྱེ་རིམ ༡༡

བིལུ་པིརིན་ཊི (༦༤༠)

Building a Simple Spectroscope — Splitting Starlight into Its Rainbow of Elements

Building a Simple Spectroscope — Splitting Starlight into Its Rainbow of Elements

Astro གྱིསIS

སྐར་ཚན་རིག

༢༤
Building a Newtonian Reflecting Telescope — Mirrors Instead of Lenses

Building a Newtonian Reflecting Telescope — Mirrors Instead of Lenses

Astro གྱིསIS

Renaissance (1400–1600)

༣༣
Building a Celestial Globe — Mapping the Stars on a Sphere

Building a Celestial Globe — Mapping the Stars on a Sphere

Astro གྱིསIS

བར་དུས

༢༣
Building a Nocturnal — The Medieval Star Clock That Tells Time by Polaris

Building a Nocturnal — The Medieval Star Clock That Tells Time by Polaris

Astro གྱིསIS

བར་དུས

༡༥
Using a Viking Sunstone — Navigating by Polarized Skylight with Iceland Spar

Using a Viking Sunstone — Navigating by Polarized Skylight with Iceland Spar

Astro གྱིསIS

ཝཱི་ཀིང

༣༠
Preparing a Viking Sunstone — Selecting and Cleaving Optical Calcite for Navigation

Preparing a Viking Sunstone — Selecting and Cleaving Optical Calcite for Navigation

Astro གྱིསIS

ཝཱི་ཀིང

༢༨
Building a Mural Quadrant — The Wall-Mounted Instrument for Precise Star Positions

Building a Mural Quadrant — The Wall-Mounted Instrument for Precise Star Positions

Astro གྱིསIS

Renaissance (1400–1600)

༣༩
Building a Galilean Telescope — The Instrument That Changed Our View of the Universe

Building a Galilean Telescope — The Instrument That Changed Our View of the Universe

Astro གྱིསIS

Renaissance (1400–1600)

༢༥
Building a Copernican Orrery — A Mechanical Model of the Heliocentric Solar System

Building a Copernican Orrery — A Mechanical Model of the Heliocentric Solar System

Astro གྱིསIS

Renaissance (1400–1600)

༢༢
Building a Cross-Staff — The Medieval Navigator's Angle-Measuring Instrument

Building a Cross-Staff — The Medieval Navigator's Angle-Measuring Instrument

Astro གྱིསIS

བར་དུས

༣༢
Building a Brass Astrolabe — The Islamic Golden Age Instrument That Mapped the Sky

Building a Brass Astrolabe — The Islamic Golden Age Instrument That Mapped the Sky

Astro གྱིསIS

རག་རྫས

༢༥
Building a Chinese Armillary Sphere — The Bronze Instrument That Mapped the Heavens

Building a Chinese Armillary Sphere — The Bronze Instrument That Mapped the Heavens

Astro གྱིསIS

ལི་རྫས

༢༠
ཀ་རའི་ནེའ་ལས་ལི་གཏོང་སྒོ་བརྟན་པ། སྦུག་ལུ། འབར་བ། དང་རི་མདོག་གི་ཐུན་མོང་

ཀ་རའི་ནེའ་ལས་ལི་གཏོང་སྒོ་བརྟན་པ། སྦུག་ལུ། འབར་བ། དང་རི་མདོག་གི་ཐུན་མོང་

Charlie གྱིསDE

རྫས་རིག

༥༧
Striking Fire with Flint and Steel — The Iron Age Upgrade to Fire Starting

Striking Fire with Flint and Steel — The Iron Age Upgrade to Fire Starting

Forge གྱིསNO

ལྕགས་བཟོ

༢༢
Making a Stone Hoe — The First Agricultural Tool

Making a Stone Hoe — The First Agricultural Tool

Mary གྱིསFI

སྔོན་ལོ

༣༤
Making Bakelite — The First Fully Synthetic Plastic That Launched the Age of Polymers
ཉེན་ཁ་ཅན།

Making Bakelite — The First Fully Synthetic Plastic That Launched the Age of Polymers

Charlie གྱིསDE

Plastic

༣༡
Synthesising Aspirin — The Reaction That Founded Modern Pharmaceuticals

Synthesising Aspirin — The Reaction That Founded Modern Pharmaceuticals

Charlie གྱིསDE

རྫས་རིག

༢༣
Making Celluloid — The First Synthetic Plastic That Changed Everything
ཉེན་ཁ་ཅན།

Making Celluloid — The First Synthetic Plastic That Changed Everything

Charlie གྱིསDE

Plastic

༤༨
Making Nitrocellulose (Guncotton) — The Nitration That Launched Smokeless Powder and Plastics
ཉེན་ཁ་ཅན།

Making Nitrocellulose (Guncotton) — The Nitration That Launched Smokeless Powder and Plastics

Charlie གྱིསDE

Plastic

༦༣
Vulcanizing Rubber with Sulfur — The Accidental Discovery That Put Tyres on the Road

Vulcanizing Rubber with Sulfur — The Accidental Discovery That Put Tyres on the Road

Charlie གྱིསDE

རྫས་རིག

༣༨