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Side view portrait of two young African-American musicians playing guitar and writing music together while sitting on floor in recording studio, copy space

This week’s new questions

8 September 2021

Will composers run out of combinations of notes for original melodies? And do rooks normally bury their food?
Why do snails sometimes leave dotted trails?

Why do snails sometimes leave dotted trails?

8 September 2021

Researchers and readers write in to explain why snails sometimes leave dotted trails. The researchers have taken it seriously and the readers have mostly made jokes
Why are there seven colours in a rainbow?

Why are there seven colours in a rainbow?

8 September 2021

Seeing seven colours in a rainbow is down to what we expect to see, not reality. In fact, there are many more colours in a rainbow, as our readers explain

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