Today I learned +

[Reynard]

TIL that the working theory of "Giant insects existed before because there was a higher Oxygen concentration in the atmosphere back then" has long been disproven. The only thing preventing giant insects from coming back is the competition and predation by mammals, reptiles and birds.

Cool.

For anyone (like me) interested, here is a good article on the subject: https://www.science.org/content/art...ugs-get-so-big-prevailing-theory-may-be-wrong

 

[Reynard]

I don't know how I never saw this before, but TIL about Light Painting and holy wow. I always thought those kinds of images were photoshops.

https://www.exploratorium.edu/tinkering/projects/light-painting

 

[Ryujin]

I don't know how I never saw this before, but TIL about Light Painting and holy wow. I always thought those kinds of images were photoshops.

https://www.exploratorium.edu/tinkering/projects/light-painting

I haven't done more than proof of concept, myself, but friends have done it. You can get some really interesting stuff by, for example, taking a long shutter pic of a car, at night, then hitting it with a flash as it passes. You end up with a light trail from the lights, leading up to a clear pic of the car. Glow sticks are also good for it. Set the shutter for maybe a minute, step in quickly, write something, and then quickly step out. There won't be enough of the person exposed to appear as more than a bit of blur, but the light writing will be clear.

 

[billd91]

I don't know how I never saw this before, but TIL about Light Painting and holy wow. I always thought those kinds of images were photoshops.

https://www.exploratorium.edu/tinkering/projects/light-painting

There are some absolutely brilliant ones that Picasso did (yes, THAT Picasso) that were part of a spread in Life Magazine.

 

[Dannyalcatraz]

I don't know how I never saw this before, but TIL about Light Painting and holy wow. I always thought those kinds of images were photoshops.

https://www.exploratorium.edu/tinkering/projects/light-painting

 

[Reynard]

View attachment 434111

This was the video I saw that sparked my post, but I decided to post a general thing instead.

So cool.

 

[Scribe]

"These results suggests that higher vitamin D levels in midlife may offer protection against developing these tau deposits in the brain and that low vitamin D levels could potentially be a risk factor that could be modified and treated to reduce the risk of dementia," says neuroscientist Martin David Mulligan, from the University of Galway in Ireland.

One more reason to supplement vitamin d.