Kentrosaurus

Kentrosaurus was about 4 to 5 metres (13 to 16 feet) long and weighed roughly 700 to 1,600 kilograms (1,500 to 3,500 pounds). Some specimens suggest even larger individuals existed.13

Kentrosaurus was a herbivore, meaning it ate plants. It used its toothless beak to bite off leaves and other plant material, which it swallowed in large chunks without much chewing.14

Yes, Kentrosaurus had a double row of spikes along its back, from its mid-section to the tip of its tail, plus a long spike on each shoulder. These spikes were likely used for defense.14

There is no direct evidence that Kentrosaurus could swim. It was a land-dwelling dinosaur that walked on four legs, and its body was not specially adapted for swimming.1

No, Kentrosaurus was much smaller than Tyrannosaurus rex. Kentrosaurus was about 4 to 5 metres long, while T. rex could be over 12 metres long; they lived in different times and places.1

No, Kentrosaurus did not have feathers. It had bony plates and spikes covered in horn, and its skin was likely scaly, like other stegosaurs.1

Kentrosaurus lived during the Late Jurassic period, about 152 million years ago, in what is now Tanzania, Africa.1

The plates on Kentrosaurus's neck and back might have been for temperature regulation, since they contained blood vessels, or for protection and display. No one knows for sure.4