From a rhythm that weaves itself through memory to our relationship with deep time, Josie Long presents a countdown of numerically-inspired short documentaries.

The Everywhen Featuring Dave Johnston-Pitt and Sam Juparulla Wickman Produced by Jaye Kranz

The Yelling Birds of the Presidio Featuring Jenny Phillips, who also shared the field recordings used to create this piece Produced by Kalli Anderson and Kaija Siirala

Counting to Six Accordion played by Kaveh Ghaffari, Tonbak by Farhad Asadi and Pedal Steel by Michael Eckert Produced by Arif Mirbaghi

Curated by Axel Kacoutié, Eleanor McDowall and Andrea Rangecroft Series Producer: Eleanor McDowall A Falling Tree production for BBC Radio 4