Fossil birds: Surfaces of cervical vertebrae show conspicuous tubercles that may have served as 'internal bony armor' : vimarsana.com

Fossil birds: Surfaces of cervical vertebrae show conspicuous tubercles that may have served as 'internal bony armor'

phys.org - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from phys.org Daily Mail and Mail on Sunday newspapers.