Ever since palaeontologists started classifying fossils and bones as dinosaurs in the early 19th century, artists have been using them to try to imagine what these prehistoric creatures might have looked like. Anyone who has seen the Victorian sculptures of dinosaurs in London’s Crystal Palace Park will know that some of these depictions were better than others.

Our knowledge of what dinosaurs looked like keeps on evolving as more fossils are discovered and analysed in new ways. In this week’s episode of The Conversation Weekly podcast, we talk to two palaeobiologists about how new discoveries have changed our image of dinosaurs – from giant lizards, into colourful, feathered and warm-blooded creatures of all sizes. Listen here or wherever you get your podcasts.

Plus, why we should be wary of artificial intelligence that could be scanning our faces and trying to read our emotions. And with only 3% of our land left ecologically intact, what we can do to restore damaged habitats.

Gemma Ware

Editor and Co-Host, The Conversation Weekly Podcast

Kulindadromeus: more evidence is emerging of feathered dinosaurs. Nobu Tamura via Wikimedia Commons

Dinosaurs: from giant reptiles to warm-blooded, feathered creatures, how our understanding of what they looked like has changed – podcast

Gemma Ware, The Conversation; Daniel Merino, The Conversation

Plus, what Israel's latest election could mean for its foreign policy. Listen to episode 11 of The Conversation Weekly podcast.

AI can be biased. aslysun/Shutterstock

AI is increasingly being used to identify emotions – here’s what’s at stake

Alexa Hagerty, University of Cambridge; Alexandra Albert, UCL

Emotion recognition technology raises questions about bias, privacy and mass surveillance.

Cheetahs in the Serengeti in Tanzania. A J Plumptre

Just 3% of Earth’s land ecosystems remain intact – but we can change that

Andrew Plumptre, University of Cambridge

One-fifth of Earth's land could be restored to wilderness by reintroducing animals and improving management.

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