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

རྒྱ་མཚོ

བིལུ་པིརིན་ཊི ༢༧ ཡོད

བིལུ་པིརིན་ཊི (༢༧)

Building a Mariner's Sextant — The Instrument That Conquered the Oceans

Building a Mariner's Sextant — The Instrument That Conquered the Oceans

Astro གྱིསIS

རྒྱ་མཚོ

༡༢
Building an Arab Kamal — The Indian Ocean Navigator's Latitude Finder

Building an Arab Kamal — The Indian Ocean Navigator's Latitude Finder

Astro གྱིསIS

རྙིང་མཐོང་སྐར་ཚན་རིག

༡༧
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

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

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

Astro གྱིསIS

སྐར་ཚན་རིག

༡༣
Preparing a Viking Sunstone — Selecting and Cleaving Optical Calcite for Navigation

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

Astro གྱིསIS

རྙིང་མཐོང་སྐར་ཚན་རིག

༡༠
Building a Cross-Staff — The Medieval Navigator's Angle-Measuring Instrument

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

Astro གྱིསIS

སྐར་ཚན་རིག

༡༥
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

རྒྱ་མཚོ

༡༣
Extracting Salt from Seawater by Boiling — Prehistoric Salt Production

Extracting Salt from Seawater by Boiling — Prehistoric Salt Production

TheChef གྱིསDK

སྔོན་ལོ

༢༤
Building a Prehistoric Coracle — A One-Person Bowl Boat from Woven Branches and Animal Hide

Building a Prehistoric Coracle — A One-Person Bowl Boat from Woven Branches and Animal Hide

Woody གྱིསNO

རྒྱ་མཚོ

༢༡
Extracting Tyrian Purple from Murex Snails — The Most Precious Colour of Antiquity
ཉེན་ཁ་ཅན་ནང་དོན

Extracting Tyrian Purple from Murex Snails — The Most Precious Colour of Antiquity

Charlie གྱིསDE

སྒྱུ་རྩལ

༢༣
Making Sepia Ink from Cuttlefish — The Natural Brown Ink of Mediterranean Artists

Making Sepia Ink from Cuttlefish — The Natural Brown Ink of Mediterranean Artists

Charlie གྱིསDE

ཁ་དོག་རྫས

༢༤
Tyrian Purple from Murex — The Most Precious Dye in Human History

Tyrian Purple from Murex — The Most Precious Dye in Human History

Tex གྱིསFO

མདོག་རྫས་དང་ཁ་དོག

༡༩
Understanding Whale Oil from Blubber Rendering — The Fuel That Lit the World Before Petroleum

Understanding Whale Oil from Blubber Rendering — The Fuel That Lit the World Before Petroleum

Bob གྱིསBE

Industry 2.0 — Electricity, Steel & Oil (1870)

༡༣
Extracting Omega-3 Fish Oil from Fatty Fish — The Marine Fatty Acids That Built the Brain

Extracting Omega-3 Fish Oil from Fatty Fish — The Marine Fatty Acids That Built the Brain

Bob གྱིསBE

སྲོག་རྫས་རིག

༡༩
Producing Cod Liver Oil from Atlantic Cod — Norway's Liquid Gold

Producing Cod Liver Oil from Atlantic Cod — Norway's Liquid Gold

Bob གྱིསBE

རྒྱ་མཚོ

༢༢
Understanding Bromine from Seawater Brine — The Only Liquid Non-Metal
ཉེན་ཁ་ཅན་ནང་དོན

Understanding Bromine from Seawater Brine — The Only Liquid Non-Metal

Peter གྱིསSE

རྒྱ་མཚོ

༡༩
Extracting Iodine from Seaweed Ash — The Violet Vapor That Prevents Goiter

Extracting Iodine from Seaweed Ash — The Violet Vapor That Prevents Goiter

Peter གྱིསSE

Industry 2.0 — Electricity, Steel & Oil (1870)

༡༨
Recovering Magnesium Salts from Seawater — The Lightweight Metal That Burns White

Recovering Magnesium Salts from Seawater — The Lightweight Metal That Burns White

Peter གྱིསSE

རྫས་རིག

༤༠
Pagkuha ng Capiz Shell — Mula Dagat Hanggang Palamuti

Pagkuha ng Capiz Shell — Mula Dagat Hanggang Palamuti

KuyaKlavo གྱིསPH

རྫས་མ་གཞི

༣༣
Récolte du sel de Guérande — Le savoir-faire du paludier breton

Récolte du sel de Guérande — Le savoir-faire du paludier breton

MrBaguette གྱིསFR

Food & Agriculture