As spring started springing, and leaves started to reappear on the trees, Robi-Jo wanted to find out why some trees lose their leaves and others don't. He joined our host Eloise to ask Paul Ashton, a botanist at Edge Hill University in the UK, who took them into the secret life of our big, leafy friends!

The Conversation's Curious Kids podcast is published in partnership with FunKids, the UK's children's radio station. It's hosted and produced by Eloise and Gemma Ware is the executive producer. Full sound credits available here. 

If you have a question for an expert, email us at curiouskids@theconversation.com or record it and send your question to us directly at funkidslive.com/curious. 

And explore more articles from our Curious Kids series on The Conversation.