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16310 threads, 330900 comments (7 Viewing)
 

Is this real

12/09/2023 by Randall
https://www.linkedin.com/posts/nathanresnick_can-you-believe-this-actually-exists-there-ugcPost-7134889195667431424-Tyzi/?utm_source=share&utm_med...
Views: 32, Comments: 4
Last comment 12/10/2023 by SolarEagle
 

Christmas present ideas for technical people

12/08/2023 by BruceFlorida
Buying presents that someone will like is a tough challenge. For technically oriented people, a small list can be created that will be a "target rich...
Views: 91, Comments: 15
Last comment 12/09/2023 by SolarEagle
 

A Unique Watch

11/30/2023 by Anonymous Poster
A long time back I remember seeing an advert and discussion about a very expensive unique men's wristwatch [only a few were constructed (they were han...
Views: 160, Comments: 5
Last comment 12/07/2023 by Randall
 

Current Thinking in Neuro-degenerative Diseases

11/29/2023 by SolarEagle
Just an interesting discussion between two Doctors about gut-brain interactions, including the causes and possible treatments and strategies going for...
Views: 55, Comments: 4
Last comment 12/01/2023 by SolarEagle
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Commercial Space

2117 threads, 4315 comments (0 Viewing)
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CR4 Feedback

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Section Blogs

Challenge Questions

429 blog entries, 30770 comments (5 Viewing)

Snail Race, Part 2 (December 2023 Challenge Question)

11/30/2023
After the fervor of last month, you are all in on snail racing. In fact you now own 25 racing snails. But now you need to identify the 3 fastest snai...
Views: 157, Comments: 12
Last comment 12/05/2023 by Ti QE

Snail Race (November 2023 Challenge Question)

10/31/2023
You have two snails, Pepe and Mac, and you want to race them in a 10 meters-long race (for snails, it's probably a marathon). When Pepe crosses the f...
Views: 620, Comments: 25
Last comment 11/27/2023 by Anonymous Poster
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Other Blog Entries of Interest

mkii Archer Automaton

11/09/2023 posted in Workbench Creations
by Del the cat
I made a mki archer automaton out of wood a few years back, it was pretty good and it shot an arrow with a convincing action. The problem was, you had...
Views: 118, Comments: 6
Last comment 11/13/2023 by Nigh

Pesky Ellipse Circumference

10/04/2020 posted in Relativity and Cosmology
by Jorrie
When I first heard that there is no easy exact formula for the circumference of the standard ellipse, I found it hard to believe. I had already learne...
Views: 463, Comments: 8
Last comment 11/30/2020 by Haymaker

SpaceProperTime Diagrams and the Central Singularity

08/24/2020 posted in Relativity and Cosmology
by Jorrie
In my prior Blog post on the Einstein equivalence principle, I have not identified important values, like the mass of the black hole, real distances a...
Views: 293, Comments: 4
Last comment 08/25/2020 by Jorrie

SPT-Acceleration and the Equivalence Principle

08/17/2020 posted in Relativity and Cosmology
by Jorrie
One day after Alice's arrival at Deep-2, she and Dot sat down for the change of shift briefing - recall that Dot must soon return for Home leave. Whil...
Views: 173, Comments: 8
Last comment 08/18/2020 by Jorrie

Space-Propertime Structure and Acceleration II

08/11/2020 posted in Relativity and Cosmology
by Jorrie
This is a fanciful little scenario for 'flexing the muscles' of acceleration in space-propertime a little and so giving a better intuitive feel for th...
Views: 188, Comments: 8
Last comment 08/18/2020 by canadianslidewinder

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