In 2020, the most expensive dinosaur fossil ever sold was acquired by a private investor for £24.7m. Anybody with money can now get their hands on a T.rex or Stegosaurus - and when big fossils come with million dollar price tags, breaking the law can be lucrative busineess.

In this episode of Wild Crimes, find out why the commercial trade in dinosaur fossils is such a big issue for science.

Join Museum palaeontologists Dr Susie Maidment and Professor Paul Barrett, Professor John Long of Flinders University in South Australia and Dr Bolortsetseg Minjin at the Institute for the Study of Mongolian Dinosaurs.

Learn more about dinosaurs and support the Natural History Museum's work at nhm.ac.uk/wildcrimes.