Science Journey (SCIENCE (サイエンス) JOURNEY (ジャーニー) Saiensu Jānī) is the 147th chapter of the Dr. Stone manga.


While sailing in a replica of a Viking longship, Senku explains that Viking sailors reached America 500 years before Columbus. The other crewmates question how the Vikings were able to navigate when the sun was unavailable. Senku posits that the Vikings used a stone to track the sun’s position that seemed magical. Ryusui reiterates the difficulty of their current route, but Senku is confident that their GPS technology will see them through. Gen questions how GPS will work in their situation, and Senku responds that they will coordinate with Ruri in Japan.

Back in Japan, the Kingdom of Science has built a sundial and numerous hourglasses. Ruri explains to Mirai that these instruments are used to provide the time in Japan to the crew via short-wave radio, which Senku can count accurately. The less scientifically-minded crewmembers are confused about how the time in Japan helps them determine their bearings, and Ryusui tells them that the time provides longitude and the sun’s position gives them latitude. The crew marvels at their analog GPS, and Senku proclaims that as long as the weather is nice, they will always know their location.

Some time later, the Perseus is caught in the middle of a thunderstorm. Gen dryly chastises Senku for tempting fate, and notes that for all his intelligence and determination, he has no luck whatsoever. Kaseki laments that the sun won’t be seen through the clouds, forcing the crew to rely on Ryusui’s intuition. Senku is worried about the amount of time they’ll lose if the storm goes too long. Suika wishes that they had the Vikings’ sunstone, which gives Chrome an idea. He retrieves a stone from their collection, and asks Kohaku to carve it into a prism. Chrome puts the prism into a viewing device with a rocket-shaped hole and brings it to the deck. Chrome uses his device to find the sun, and Senku excitedly notes that the prism is made of calcite, a naturally transparent stone. Ryusui remembers that calcite had been discovered in the wrecks of Viking longships, and Ukyo remarks that the legend seems to be true.

The journey to America continues without issue, as the Perseus weathers more storms. The crew sees many wondrous sights, like a massive iceberg and a pod of whales. Eventually, Homura spots the shores of America, and shouts down to the crew, who are eagerly staring at the new land.

Characters in Order of Appearance

Chapter Notes

  • The Sunstone is invented by Chrome and used to navigate to America.
  • The Perseus has reached the American continent.

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Chapters and Volumes
Volume 1 1234567Extras
Volume 2 89101112131416Extras
Volume 3 17181519202122232425Extras
Volume 4 262728293031323334Extras
Volume 5 353637383940414243Extras
Volume 6 444546474849505152Extras
Volume 7 535455565758596061
Volume 8 626364656667686970
Volume 9 717273747576777879
Volume 10 808182838485868788
Volume 11 899091929394959697
Volume 12 9899100101102103104105106
Volume 13 107108109110111112113114115
Volume 14 116117118119120121122123124
Volume 15 125126127128129130131132133
Volume 16 134135136137138139140141142
Chapters not yet in tankōbon format 143144145146147148149150151152153154155156157158159160161162163164165166
[v  e]
Story Arcs
Prologue Saga
Stone Formula Arc
Chapters 1234
Episodes 12
Vs. Tsukasa Arc
Chapters 56789101112
Episodes 345
Ishigami Village Saga
Kingdom of Science Arc
Chapters 131415161718192021222324252627282930313233
Episodes 5678910111213
Village Games Arc
Chapters 34353637383940
Episodes 131415
Village Origins Arc
Chapters 4142434445
Episodes 1617
Stone Wars Saga
Vs. Hyoga Arc
Chapters 4647484950
Episodes 1819
Communications Arc
Chapters 5152535455565758596061626364656667686970717273747576777879808182
Episodes 2021222324
Source of the Petrification Saga
Age of Exploration Arc
Chapters 8384858687888990919293949596979899 100
Treasure Island Arc
Chapters 101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138
The Truth of the Petrification Saga
New America City Arc
Chapters 139140141142143144145146147148149150151152153154155156157158159160161162163164

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