the.com/mammals
Warm-blooded animals defined entirely by snacks: we are the milk gang.
means A class of vertebrates that nurse their young with milk, grow hair, and keep their bodies warm from the inside.
from From Latin mamma, meaning breast — Linnaeus named the whole class after the one trait every member uses to feed its babies, a choice as practical as it was scandalous in 1758.
Egg exceptionPlatypus and echidnas lay eggs, then still nurse.
Tiny tallyAround 6,400 species, vastly outnumbered by beetles.
Ear bonesReptile jaw bones migrated to become mammal hearing.
Size rangeBumblebee bat to blue whale, same club.