
Its arrival had been a closely guarded secret for months.
Then finally, on Friday, the Field Museum prepared to unveil the largest predatory dinosaur ever discovered — when one of its 2-foot-long tail bones snapped.

Its arrival had been a closely guarded secret for months.
Then finally, on Friday, the Field Museum prepared to unveil the largest predatory dinosaur ever discovered — when one of its 2-foot-long tail bones snapped.