Once a scientifically important fossil enters a private collection, access for researchers is no longer guaranteed, says this paleontologist.

A large T. rex skeleton nicknamed ‘Gus’ is on track to break auction records, and highlight one of paleontology’s biggest predicaments.

Palaeontologists warn before auction at Sotheby’s in New York that super-rich collectors are harming research

Private buyers are increasingly outbidding museums for fossils.