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CrowdScience heads to the Sydney Science Festival in Australia where, from a special event at The Powerhouse Museum, we reveal answers to questions listeners have been sending in such as: What living thing has the most toxic venom? What is déjà vu? And why do our fingers wrinkle in the bath? To tackle our listeners’ questions about life, Earth and the universe, presenter Marnie Chesterton is joined by four special guests who will bring the good, weird and bemusing from the world of science to the stage.

Prof Shari Forbes, Professor in Forensic Science at the University of Technology Sydney,aims to help police and forensic teams establish a more precise time of death in missing person and homicide cases.

Dr Katie Mack is an astrophysicist at the University of Melbourne. Her work focuses on finding new ways to learn about the early universe and fundamental physics using astronomical observations.

Dr Jonathan Webb runs the science unit at ABC RN. He is also a former neuroscientist and a former science reporter for Â鶹Éç News in London.

Dr Alice Williamson is a chemistry lecturer and researcher at The University of Sydney. She hosts a weekly science segment, Up and Atom on FBi Radio in Sydney, co-hosts RN’s Dear Science, and is a regular guest on Dr Karl's Shirtloads of Science podcast.

Do you have a question we can turn into a programme? Email us at crowdscience@bbc.co.uk

Presenter: Marnie Chesterton
Producer: Marijke Peter and Jen Whyntie

(Image: Koala in tree Credit: Getty Images)