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This picture taken on June 27, 2016 shows the Flaming Cliffs in the Gobi desert. For years, herder Gelegrash had a sideline bringing tourists to see a dinosaur skull hidden near the Flaming Cliffs in Mongolia's Gobi desert. Then, one day, it was gone. It is one of thousands of ancient fossils that have disappeared from the country since American explorer Roy Chapman Andrews -- supposedly the inspiration for the movie character Indiana Jones -- discovered dinosaur eggs there nearly a century ago. / AFP / Johannes EISELE / TO GO WITH Mongolia-US-palaeontology-dinosaurs-trade, FEATURE by Ben DOOLEY (Photo credit should read JOHANNES EISELE/AFP via Getty Images)

This picture taken on June 27, 2016 shows the Flaming Cliffs in the Gobi desert. For years, herder Gelegrash had a sideline bringing tourists to see a dinosaur skull hidden near the Flaming Cliffs in Mongolia's Gobi desert. Then, one day, it was gone. It is one of thousands of ancient fossils that have disappeared from the country since American explorer Roy Chapman Andrews -- supposedly the inspiration for the movie character Indiana Jones -- discovered dinosaur eggs there nearly a century ago. / AFP / Johannes EISELE / TO GO WITH Mongolia-US-palaeontology-dinosaurs-trade, FEATURE by Ben DOOLEY (Photo credit should read JOHANNES EISELE/AFP via Getty Images)
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AFP JOHANNES EISELE