Building a DIY CT/CAT scanner for $200 [video](youtube.com)84 points by walterbell 2 years ago | 11 comments
Make Pottery at Home Without a Kiln (Or Anything Else) [video](youtube.com)101 points by surprisetalk 2 years ago | 31 comments
Let's give the Mac Classic 4 megs of RAM [video](youtube.com)51 points by zdw 2 years ago | 15 comments
Why does water change the speed of electricity? [video](youtube.com)32 points by skibz 3 years ago | 3 comments
How Do Nuclear Submarines Make Oxygen [video](youtube.com)63 points by thunderbong 3 years ago | 39 comments
![Screenshot of youtube.com: Building a DIY CT/CAT scanner for $200 [video]](https://hn.urlbox.com/shots/renders/2024/1/28/5c51fe2b-6938-4a08-af1b-bc060d6c4f7d.jpg)
![Screenshot of youtube.com: Making infrared cooling paint from grocery store items [video]](https://hn.urlbox.com/shots/renders/2023/7/5/ca30eeb0-661d-455d-82ca-b2c7be519c13.jpg)
![Screenshot of youtube.com: Make Pottery at Home Without a Kiln (Or Anything Else) [video]](https://hn.urlbox.com/shots/renders/2024/10/2/010b650a-3093-482a-95d0-e5ba591a9942.jpg)
![Screenshot of youtube.com: Let's give the Mac Classic 4 megs of RAM [video]](https://hn.urlbox.com/shots/renders/2024/3/11/f782a74b-f19b-4bdb-aaa5-fa8b32689f5f.jpg)
![Screenshot of youtube.com: Why does water change the speed of electricity? [video]](https://hn.urlbox.com/shots/renders/2023/9/19/f394ce63-964a-4956-b87b-7b9de63225e9.jpg)
![Screenshot of youtube.com: We made a hot dog talk with RF [video]](https://hn.urlbox.com/shots/renders/2024/3/28/995b6d89-5f72-4982-b5c1-ef93aef29668.jpg)
![Screenshot of youtube.com: How Do Nuclear Submarines Make Oxygen [video]](https://hn.urlbox.com/shots/renders/2023/6/17/b6ddce15-3675-4a3d-a14f-b1259c9bad4d.jpg)