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🎄 Open the decoder experiment by tapping this link, run the video above, and discover the mysterious message. 🎅


We started hibernation. From 10 January we start catching up what we missed. Happy restful Holidays! 😊🎄🧘💤

Our Review 2021 on Twitter still continues and there is a new smartphone practical on the Doppler effect for cycling by LEIFIphysik (in German) with a corresponding YouTube video to enjoy in the meantime.

Finally, you should totally check for news here on Christmas Eve…