Assertion: whale's need | /r/CapableOf | breathe air
Facets:
Source sentences:
text: Several characteristics point to the ancestral origin of whales including the need to breathe air (unlike fish that have gills) despite living exclusively in the ocean, bones in their flippers which resemble limbs that were once used for walking and hunting on land, and the vertical shape of their spines (more likely designed for running rather than swimming) as opposed the horizontal design and movement of fish.
text: Marine mammals share several characteristics that are common among all mammals such as the need to breathe air, being warm-blooded, having mammary glands which produce milk to feed their young, giving birth to live young (pregnancy/gestation periods) and in some cases having hair.