Learn why some dinosaurs had air sacs in their vertebrae and how it relates to modern day birds. advertisement. Discover Magazine. Theropod Dinosaurs Could Have Had Hollow Bones Like Modern Day Birds.

Why do almost all vertebrates have tails, even when they don’t seem useful, but apes and frogs don’t? Stephen Johnson Eugene, Oregon, US. All non-aquatic vertebrates descend from a common ...

Spinal disks are rubbery pads between the vertebrae, the specialized bones that make up the spinal column. Doctors call them intervertebral disks. Each disk is a flat, circular capsule about an ...

Learn about scoliosis, a spinal condition affecting many, including celebrities like Usain Bolt, and how it's treated.

Neural foraminal stenosis is a condition where a nerve in the spine becomes compressed as the openings between the vertebrae become smaller. As the nerve becomes trapped, there may be pain, muscle ...

If osteoporosis has caused a spinal compression fracture, the treatment should address the pain, the fracture, and the underlying osteoporosis to prevent future fractures. All components of ...

New fossils are revealing the earliest jawed vertebrates — a group that encompasses 99 percent of all living vertebrates on Earth, including humans. Skip to content. Subscribe or renew today ...

The CT scans revealed that the B. ultimus vertebrae were indeed hollow — not exactly a surprise since most other theropods and sauropods examined had hollow bones. But not all vertebrae are pneumatic ...