Video by Royal Society of Chemistry, from Jan 2022.

Getting enough light is vital for regulating our sleep, combatting depression and seasonal affective disorder and maintaining good physical health.

Via TKSST.

Companion "explainer" video.

På Uppsala universitet möts vi över gränser. Här möter du människor från olika bakgrunder, med olika framtidsdrömmar och med olika förutsättningar.

The infographic plots cities around the world based on the urban population density and per capita transport energy use. North American cities are the least dense with highest energy use, while Asian, African, Latin American and European cities have varying densities, but fall in the category of low energy use per capita.

Via reddit.

Let's say you have a tablet or reserve phone without a phone number (i.e., SIM-card) that you would nonetheless like to have Signal installed on. Turns out it's possible.

BUT NOTE THAT SIGNAL WILL DE-REGISTER YOUR ORIGINAL DEVICE ONCE YOU REGISTER THE NEW ONE!
There is still no way to have Signal on more than one device, and you can't link Signal on one device to another device. Too bad, would have been nice, especially with database encrypted at rest (which Molly allows).

• Connect your secondary device to the Internet
• Install Molly-FOSS or Molly or Signal on the secondary device, and initiate Signal's registration process (enter your phone number)
• You will get a code via sms on your primary Signal device
• Enter the code on the secondary device using the numeric keyboard (this worked just fine in my case)
• Enter your Signal PIN
• With that, Molly-FOSS/Molly/Signal should start and show you your groups

While we're at it, why not install Molly or even Molly-FOSS instead of the official Signal app? The benefit of using Molly-FOSS is that we can install it on a device not using Google (the drawback is that push notifications will consume a little more battery).

• What originally sent me exploring Signal app forks was this issue
• https://github.com/mollyim/mollyim-android
• https://molly.im/fdroid/
• https://reddit.com/r/CalyxOS/comments/ptll4t/molly/
• Another Signal fork