Assertion: cetacean's layer | /r/CapableOf | protect their vital organs
Facets:
value: from freezing temperatures
type: TRANSITIVE-OBJECT
Source sentences:
text: Evolution requires energy and its possible that given the amount of time whales have been on earth the most important and immediate changes were to increase their size for better protection against predators and cold environments, develop a thick layer of blubber to protect their vital organs from freezing temperatures, move their nostrils (blowholes) to the top of their head in order to make breathing easier, evolve their hearing and develop echolocation to navigate in the dark and gain better insights into their environment, maintain a separate esophagus and trachea to improve their ability to hunt for food underwater while protecting their lungs and modify their limbs into flippers and flukes among other changes.