Assertion: penguin's layer | /r/HasProperty | thick
Facets:
value: several centimeters
type: OTHER
value: before breeding
type: TEMPORAL
Source sentences:
text: Penguins have a thick layer of insulating feathers that keeps them warm in water (heat loss in water is much greater than in air).
text: Dense feathers provide 80–90% of its insulation and it has a layer of sub-dermal fat which may be up to 3 cm (1.2 in) thick before breeding.
text: The fat layer (also called blubber) is several centimeters thick and helps penguins in staying warm, even in extreme conditions.
text: Penguins have a thick layer of insulating feathers that keep them warm in water (heat loss in water is much greater than in air).