STUDY: Want ‘sustained happiness’? Get religion.

[Aractus]

They're starting to think lots of dinosaurs had feathers, and I want to say I heard somewhere recently that they found a fossil of a dinosaur sitting on its eggs like a bird. There has already been some speculation that the dinosaurs were warmblooded, and there's now some conjecture that feathers may have helped with warming eggs long before they were used for flying.

Although what you said is mostly correct you have to remember that only specific types of dinosaurs had feathers. Dinosaurs that walked on four legs for instance did not have feathers. Just the carnivorous ones that were bipedal. Your stegosaurus, brontosaurus, etc. were not feathered. That dinosaurs are the ancestors to birds and were warm-hearted isn't speculation it's accepted scientific fact - there's hard evidence from fossils and even harder evidence from bird DNA.

Don't surveys suffer the weaknesses of self-selection and internal bias?

Not necessarily, that's why you explain where you got your participants from and how they were selected. The data that the paper used covered a wide range of people across 10 different countries, so I'd say they'd done their bit to get as wide as possible a sample.