When all we have left of dinosaurs is their fossilised bones, how do we know what they looked like on the outside? That’s what nine-year-old Kara from London wanted to know.

She joined our host Eloise to get some answers from paleobiologist Neil Gostling at the University of Southampton in the UK and find out all the ways scientists work out what dinosaurs looked like – from the way they walked, to their muscles and even what colour they were.

A podcast from The Conversation, the independent not-for-profit news organisation that brings you news and analysis straight from academic experts. Full credits available here.

This season is supported by the University of Southampton in the UK, a world-leading research-intensive university with a global network of international students and campuses in Malaysia and Delhi.

Are you a curious kid with a question? Pop it in an email, or record it and send us the audio to curiouskids@theconversation.com.

• Curious Kids: what was the biggest dinosaur that ever lived?
• If an asteroid hit Earth and all the humans died, would the dinosaurs come back? The Conversation’s Curious Kids podcast
• Curious Kids: could dinosaurs evolve back into existence?

Nine-year-old Eva was watching an episode of the children’s show Horrible Histories about the stone age recently when a question popped into her head. The cave men were speaking a broken form of English, but Eva thought that didn’t sound right and she wondered: how was the first language formed?

She joined our host Eloise to get some answers from anthropologist April Nowell from the University of Victoria in Canada.

A podcast from The Conversation, the independent not-for-profit news organisation that brings you news and analysis straight from academic experts. Full credits available here.

This season is supported by the University of Southampton in the UK, a world-leading research-intensive university with a global network of international students and campuses in Malaysia and Delhi.

Are you a curious kid with a question? Pop it in an email, or record it and send us the audio to curiouskids@theconversation.com.

• Curious Kids: who was the first person to speak English?
• Curious Kids: how did humans think about things, before they had language to think with?
• Curious Kids: are some languages more difficult than others?

There are currently 118 chemical elements on the periodic table. The last one added was oganesson, which was first created by scientists in 2002.

Seven-year-old Robyn wants to know whether scientists will be able to make any more new elements to add to the periodic table, and how they'll do it! He joined our host Eloise to ask biochemist Mark Lorch from the University of Hull in England.

A podcast from The Conversation, the independent not-for-profit news organisation that brings you news and analysis straight from academic experts. Full credits available here.

This season is supported by the University of Southampton in the UK, a world-leading research-intensive university with a global network of international students and campuses in Malaysia and Delhi.

Are you a curious kid with a question? Pop it in an email, or record it and send us the audio to curiouskids@theconversation.com.