Fossil records from a 150 million-year-old sea reptile reveal that dinosaurs suffered from arthritis. A study of a pliosaur fossil indicated that the sea reptile had an arthritic-like condition in her lower jaw that eventually left her unable to feed.

Scientists believe that dinosaur gas emissions may have raised earth’s temperature. It is estimated that sauropods once released approximately 520 million tons of methane a year, potentially enough to warm earth’s climate.

Read more on CBS News.

A recent study found that large, plant-eating dinosaurs were already headed for extinction before an asteroid hit Earth 65.5 million years ago. Research indicates that large plant eaters, including hadrosaurs and ceratopsids were declining as a result of changes in the earth’s terrain, including volcanism and sea level changes. Small plant-eaters, carnivorous dinosaurs and huge plant-eaters without advanced chewing abilities all appear to have been prospering before the asteroid.

Read more on Discovery News.