The mystery of the dark rainbow

Many years ago I saw a "dark rainbow". A perfect bow,  a dark curved band in the air, the same width and same shape as a normal rainbow. It was appearing in the south, where the dim sun also appeared, around 11:00 am. Later that day, my social network confirmed that others had seen this mysterious phenomenon as well. Mysterious indeed; nobody knew what it was or what could be the physical explanation! I contacted several meteorologists by email, but I never received an answer. All those years, none of the meteorological books that came in my hands provided a even the smallest clue... What could it have been?!!

Lego einfach reinigen

Altes Lego auf dem Dachboden? Total verstaubt und verschmutzt? Mein Versuch so was recht unkompliziert sauber zu bekommen, hat so gut funktioniert, das ich ein paar Tips gerne hier teilen möchte.

Worterfindungen 2020

Nach langer Zeit habe ich  unser Whiteboard in der Küche mal komplett sauber gemacht, und dabei zwei Worterfindungen aus 2020 weggewischt, die ihre eigene Geschichte haben.

Amazing photos of melting glaciers and mountain summits in the Italian Alps

 

This church in Trafoi is still standing. The big hotel in the back had a fire and wasn't rebuilt. But what is really missing in the background is the big glacier!
Left image: SLUB / Deutsche Fotothek / Möbius, Walter; Right image: J. Everaars

When I visited the Italian Alps for a scientific project on the effect of climate and land use change on pollinators, I tried to re-picture some of the sites I found on historical photos. Here are some of the results. 

Repairing - a broken computermouse

Sometimes your mouse doesn't click anymore and replacing the batteries doesn't help. Something is broken, but the mouse didn't fall...

You're right - and you can fix it! It is just the wear of a part; a piece of metal that lost it's tension! I found this solution on this page by Nigel, who gets the credits:
http://www.redferret.net/?p=31008
This trick does not only safe money, it also safes electronic waste, and you can repeat it over and over again! I had to do it about twice a year, and it worked for about 6 times, extending the life of my mouse for three years!!! I found this so great that I decided to make a quick manual myself, to share with you.

Schmetterlinge aus Ahorn und Esche

Einfacher geht fast nicht; aus Ahornsamen und Samen von Esche und Zweige, lassen diese Schmetterlinge und Libellen sich leicht basteln.

Geburtstagsessen: Bienen, Käfer, Igel, Schnecken und Spinnen

 
Basteln mit Essen macht viel Spaß. Diese Teller mit Bienen, Käfer und Libellen sind eine farbige Angelegenheit geworden, und schmeckten zudem gut!