This week’s new questions

What could have caused the patchwork of colours on this leaf (pictured)? And what is the best way to preserve images digitally so that they can be accessed 100 years from now?

24 November 2021

New Scientist. Science news and long reads from expert journalists, covering developments in science, technology, health and the environment on the website and the magazine. — Rian Hughes

What is going on to create this amazing multicoloured leaf pattern?

Rian Hughes, London, UK

2H49JNK A stack of DVDs on a table with a reflection. Objects on a black background — Сергей Овчинников/Alamy

I want to preserve scenes from my childhood (currently on DVDs) for at least the next 100 years. With technology progressing so rapidly, what is the best format for this?

Chris Szymonski, Waupaca, Wisconsin, US

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