Children are the best language learners, says psycholinguist Evan Kidd. But how do children learn languages so easily, and why is learning another language so hard when you're an adult? It's something we've been wondering since we moved to Barcelona, Spain this summer. Evan Kidd shares his quest to put together the complex puzzle of how humans learn language. What he's discovered might change the way you think about your own native tongue.

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If you have any questions about science that you'd like Lindsay and Marshall to help answer, go to our website - www.sciencepodcastforkids.com - and use the contact form. While you're there, you can also find a blog with lots of great resources about this episode.