the.com/echidna
a spiky mammal that lays eggs, has no nipples, and dreams hardest of all
egg-laying mammalOne of only five monotremes left on Earth
four-headed partsMales sport a penis with four heads
milk sweatNo nipples; milk oozes through skin patches
electric snoutBeak detects prey's faint electrical signals
deep dreamerShows the most REM sleep of any animal